triangle def is circumscribed about circle o with de=15 df=12 and ef=13


Find the length of each segment whose endpoints are D and the points of tangency on DE and DF

Answers

Answer 1

Answer:

  7

Step-by-step explanation:

You want the tangent lengths from point D for ∆DEF circumscribing a circle, given DE=15, DF=12, DF=13.

Tangent segments

The lengths of the tangent segments from vertex D are ...

  d = (DE +DF -EF)/2 = (15 +12 -13)/2 = 7

The tangent segments with end point D are 7 units long.

__

Additional comment

The tangents from each point are the same length, so we have ...

  d + e = DE . . . . where d, e, f are the lengths of the tangents from D, E, F

  e + f = EF

  d + f = DF

Forming the sum shown above, we have ...

  DE +DF -EF = (d +e) +(d +f) -(e +f) = 2d

  d = (DE +DF -EF)/2 . . . . as above

The other tangents are e = 8, f = 5.

Triangle Def Is Circumscribed About Circle O With De=15 Df=12 And Ef=13Find The Length Of Each Segment

Related Questions

how much more probable is it that one will win 6/48 lottery than the 6/52lottery?

Answers

It is about 1.657 times more probable to win a 6/48 lottery than a 6/52 lottery.

To find out how much more probable it is to win a 6/48 lottery than a 6/52 lottery, we need to compare their respective probabilities of winning.

The probability of winning a 6/48 lottery is given by the formula:

P(6/48) = C(6, 48) = 1/12271512

where C(6, 48) is the number of ways to choose 6 numbers out of 48.

Similarly, the probability of winning a 6/52 lottery is given by the formula:

P(6/52) = C(6, 52) = 1/20358520

where C(6, 52) is the number of ways to choose 6 numbers out of 52.

To find out how much more probable it is to win the 6/48 lottery than the 6/52 lottery, we can calculate their relative probabilities:

P(6/48) / P(6/52) = (1/12271512) / (1/20358520) ≈ 1.657

Therefore, it is about 1.657 times more probable to win a 6/48 lottery than a 6/52 lottery.

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Find the area of the triangle. Round your answer to the nearest tenth. A 58 yd 54° a. 1,360.8 yd² B 58 yd b. 1,682 yd² с c. 2,721.5 yd² d. 2,315.1 yd²​

Answers

The formula for the area of a triangle is 1/2 * base * height * sin(angle between them).

Using the given information, we can find the height of the triangle:

height = 58 * sin(54) ≈ 45.4

Now we can find the area of the triangle:

area = 1/2 * 58 * 45.4 ≈ 1317.4 ≈ 1,317.4

Rounded to the nearest tenth, the area of the triangle is 1,317.4 yd².

Therefore, the answer is A) 1,360.8 yd².

A music stereo is packed in a box shaped like a rectangular prism that measures 18.5 by 32 in by 12.2 in. What is the volume of the box

Answers

Okay, let's solve this step-by-step:

* The box is shaped like a rectangular prism

* It has dimensions:

** 18.5 inches long

** 32 inches wide

** 12.2 inches deep

To find the volume of a rectangular prism, we use the formula:

Volume = Length x Width x Depth

So in this case:

Volume = 18.5 inches x 32 inches x 12.2 inches

= 18.5 * 32 * 12.2

= 5796 cubic inches

Therefore, the volume of the box is 5796 cubic inches.

Let me know if you need more details!

The volume of a rectangular prism can be calculated by multiplying its length, width, and height. In this case, the length is 18.5 inches, the width is 32 inches, and the height is 12.2 inches. Therefore, the volume of the box is:

V= 18.5 x 32 x 12.2
V= 7254.4 cubic inches

Therefore, the volume of the box is 7254.4 cubic inches.

Let A be a 4 x 3 matrix and suppose that the vectors:
z1=[1,1,2] T
z2=[1,0,-1] T
*T stands for transpose*
Form a basis for N(A). If b=a1+2*a2+a3, find all solutions of the system Ax=b.

Answers

The general solution to Ax=b can be written as:

x = [2,2,6] T + c1*[1,1,2] T + c2*[1,0,-1] T

where c1 and c2 are arbitrary constants

Since the vectors z1 and z2 form a basis for the null space of A, any solution to Ax=0 can be expressed as a linear combination of these vectors. In other words, if x is a vector in N(A), then x can be written as:

x = c1z1 + c2z2

where c1 and c2 are constants.

To find all solutions to Ax=b, we can first find a particular solution xp to Ax=b using any method such as Gaussian elimination or inverse matrix. Then, the general solution to Ax=b can be written as:

x = xp + c1z1 + c2z2

where c1 and c2 are constants.

Let's first find a particular solution xp to Ax=b. We have:

A = [a1, a2, a3]

b = a1 + 2*a2 + a3

We want to find a vector xp such that Axp = b. We can write xp as:

xp = c1z1 + c2z2

where c1 and c2 are constants to be determined. Substituting xp into the equation Axp = b, we get:

c1a1 + c2a2 = -a3

Since the vectors z1 and z2 form a basis for N(A), we know that a linear combination of a1, a2, and a3 is equal to zero if and only if the coefficients of the linear combination satisfy the equation:

c1z1 + c2z2 = 0

In other words, we have:

c1*[1,1,2] T + c2*[1,0,-1] T = [0,0,0] T

This gives us the system of linear equations:

c1 + c2 = 0

c1 + 2c2 = 0

2c1 - c2 = 0

Solving this system of equations, we get:

c1 = 2

c2 = -2

Substituting these values into the equation xp = c1z1 + c2z2, we get:

xp = 2*[1,1,2] T - 2*[1,0,-1] T = [2,2,6] T

So, a particular solution to Ax=b is xp = [2,2,6] T.

Therefore, the general solution to Ax=b can be written as:

x = [2,2,6] T + c1*[1,1,2] T + c2*[1,0,-1] T

where c1 and c2 are arbitrary constants

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You brake your car from a speed of 55 mph, and in doing so, your car's speed decreases by 10 mph every second. The table shows braking data that represent your car's speed versus the amount of time elapsed from the moment that you applied the brake.

(table in image)

Does the data represent a linear function? Why or why not?
a. Yes, the average rate of change is constant.
c. There is not enough information to determine whether this is a linear function.
b. No, the average rate of change is not constant.
d. No, this is not a linear equation.

Answers

Answer:

a

Step-by-step explanation:

every second it goes down my 10

the answer would be A.

Express cos L as a fraction in simplest terms.

Answers

Cos L as a fraction in simplest terms is equal to √803 / 121

What is trigonometry?

The mathematical subject of trigonometry is the study of the connections between the angles and sides of triangles.

It entails investigating trigonometric functions like sine, cosine, and tangent, which relate a triangle's angles to its sides' lengths.

To find cos L, we need to use the ratio of the adjacent side to the hypotenuse in the right triangle LMN.

cos L = LM / LN

We know that LM = √73 and LN is the hypotenuse of the triangle, which can be found using the Pythagorean theorem:

LN = √(LM² + MN²)

= √(73 + 48)

= √121

= 11

Therefore, cos L = LM / LN = √73 / 11.

To simplify this fraction, we can rationalize the denominator by multiplying the numerator and denominator by 11:

cos L = √73 / 11 × 11 / 11

= √(73 × 11) / 121

= √803 / 121

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given an integer n, show that you can multiply n by 35 using only five multiplications by 2, two additions and storing intermediate results in memory

Answers

We can successfully multiplied n by 35 using only five multiplications by 2, two additions, and intermediate storage of results.

How can we show to multiply n by 35?

We can use the following sequence of operations:

Multiply n by 4 using two multiplications by 2.

Multiply n by 8 using three multiplications by 2.

Add the result of step 1 to the result of step 2 using one addition.

Multiply n by 2 using one multiplication by 2.

Add the result of step 3 to the result of step 4 using one addition.

Multiply the result of step 5 by 4 using two multiplications by 2.

Add the result of step 5 to the result of step 6 using one addition.

The final result is n × 35.

Here's how it works:

Step 1: 4n

Step 2: 8n

Step 3: 4n + 8n = 12n

Step 4: 24n

Step 5: 12n + 24n = 36n

Step 6: 144n

Step 7: 36n + 144n = 180n

So, we have successfully multiplied n by 35 using only five multiplications by 2, two additions, and intermediate storage of results.

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What is the area of the shaded segment shown in O below?

Segment area=degree/360 pie r 2sin(degree)

Answers

The area of the segment is 1.68 squared.

How to find area of the shaded segment?

The area of the shaded segment is the subtraction of the area of the triangle from the area of the sector OMN.

Therefore,

area of the segment  = ∅ / 360 πr² - 1 / 2r²sin(∅)

area of the segment  = 30 / 360 π(12)² - 1 / 2 (12)² sin 30°

area of the segment  = 1 / 12 π(144) - 1 / 2(144)0.5

area of the segment  = 12π  - 36

area of the segment  = 12(3.14) - 36

area of the segment  = 37.68 - 36

area of the segment  = 1.68 inches squared.

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Each student in Mrs. Wimberly’s six science classes planted a bean in a Styrofoam cup. All beans came from the same source, were planted using the same bag of soil, and were watered the same amount. Mrs. Wimberly has 24 students in each of her six classes. In first period, 21 of the 24 bean seeds sprouted.





Which statement about the seeds in the remaining five classes is NOT supported by this information?
Responses
A 87.5% of the bean seeds should sprout.87.5% of the bean seeds should sprout.
B More than 100 bean seeds should sprout.More than 100 bean seeds should sprout.
C 1 out of 8 bean seeds will not sprout.1 out of 8 bean seeds will not sprout.
D At least 20 bean seeds will not sprout.At least 20 bean seeds will not sprout.

HELP ME PLEASEE IS TIMED!!!

Answers

Answer: D

Explanation: Since 21 out of 24 bean seeds sprouted in the first class, the probability of a bean seed sprouting is 21/24, or 0.875. This information does not provide any information about the seeds in the other five classes, other than that they were all planted using the same method. Therefore, we cannot make a definitive statement about how many seeds will or will not sprout in the other classes. Option A is supported by the given information, since 87.5% of the seeds in the first class sprouted. Option B is not necessarily supported by the given information, as it depends on how many seeds were used in total. Option C is not directly supported by the given information, but is a possible conclusion based on the probability of a seed sprouting. Option D is contradicted by the given information, since at most 3 out of 24 seeds did not sprout in the first class.

If B=x*y then 2x*5y =

Answers

Answer: x * y = 2x + 5y. Formula used: x * y = 2x + 5y. Calculation: When x = 3, and y = 5. ⇒ 2x + 5y = (2 × 3) + (5 × 5) = 6 + 25 = 31

Step-by-step explanation:

This table shows equivalent ratios. A 2-column table with 4 rows. Column 1 is labeled A with entries 2, 3, 4, 5. Column 2 is labeled B with entries 6, 9, 12, 15. Which ratios in the form A:B are equivalent to the ratios in the table? Check all that apply. 1:3 6:20 7:21 9:3 10:30

Answers

The ratios that are equivalent to the ratios in the table are 1:3 and 10:30. (optio a or d).

The given table shows two columns, A and B, with four entries each. Each entry in column A is paired with a corresponding entry in column B. To determine which ratios in the form A:B are equivalent to the ratios in the table, we need to find the common factor between each pair of entries.

Similarly, for the second row with A=3 and B=9, we can simplify the ratio to 1:3 by dividing both A and B by their greatest common factor, which is 3.

For the third row with A=4 and B=12, we can simplify the ratio to 1:3 by dividing both A and B by their greatest common factor, which is 4/2=2.

For the fourth row with A=5 and B=15, we can simplify the ratio to 1:3 by dividing both A and B by their greatest common factor, which is 5/5=1.

Therefore, the ratios in the form A:B that are equivalent to the ratios in the table are 1:3 for all four rows.

The ratio 10:30 can be simplified by dividing both terms by their greatest common factor of 10, which gives 1:3. This ratio is equivalent to the ratios in the table.

Hence the correct option is (a) or (d).

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7+2x/3=5 whats the answer?

Answers

x=-3
subtract 7 from both sides
2x/3=-2
multiply both sides by 3
2x=-6
divide by 2 on both sides
x=-3

Suppose that ACDE is isosceles with base EC.
Suppose also that mZD= (2x+42)° and mZE= (4x+14)°.
Find the degree measure of each angle in the triangle.
Check
-(4x + 14).
(2x + 42)
m2c=
mZD=
mZE =
X
D
0

Answers

Okay, here are the steps to solve this problem:

1) Since ACDE is isosceles with base EC, the angles at the base (mECD and mCEA) are equal. Let's call this common angle measure θ.

2) We know: mZD = (2x + 42)°

So, (2x + 42) + θ = 180° (angles sum to 180° in a triangle)

2x + 42 + θ = 180

=> 2x = 138

=> x = 69

3) Substitute x = 69 into mZE = (4x + 14)°

=> mZE = (4(69) + 14) = 278°

4) Now we have all 3 angles:

mECD = mCEA = θ (these are equal, common base angle)

mZD = (2)(69) + 42 = 174°

mZE = 278°

5) As a check:

174 + 278 + θ = 180

θ = 128

So the degree measures of the angles are:

mECD = mCEA = 128° (common base angle)

mZD = 174°

mZE = 278°

Let me know if you have any other questions! I'm happy to explain further.

Use synthetic division and the Remainder Theorem to evaluate P(c). P(x) = 2x2 + 9x + 4, c = 1 /2
P 1/ 2 =

Answers

We add 1 and 3/2 to get 5/2, which is the remainder. According to the Remainder Theorem, this is the value of P(c). Therefore, P(1/2) = 5/2.

To use synthetic division and the Remainder Theorem to evaluate P(c), we first set up the synthetic division table with the constant term of P(x) as the divisor and c as the value we want to evaluate:

1/2 | 2   9   4
   |_______
   
Next, we bring down the leading coefficient 2:

1/2 | 2   9   4
   |_______
       2

Then, we multiply c (1/2) by 2 and write the result under the next coefficient:

1/2 | 2   9   4
   |_______
       2   1

We add 2 and 1 to get 3, and then multiply c by 3 to get 3/2 and write it under the last coefficient:

1/2 | 2   9   4
   |_______
       2   1
           3/2

We add 1 and 3/2 to get 5/2, which is the remainder. According to the Remainder Theorem, this is the value of P(c). Therefore, P(1/2) = 5/2.

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PLEASE HELP DUE AT MIDNIGHT

Answers



(a) To find the equations of medians AD, BE, and CF, we need to first find the coordinates of D, E, and F.

The coordinates of the midpoint of a line segment with endpoints (x1, y1) and (x2, y2) are ((x1 + x2)/2, (y1 + y2)/2).

So, the coordinates of D are:

((Bx + Cx)/2, (By + Cy)/2) = ((-9 + 1)/2, (6 - 4)/2) = (-4, 1)

The coordinates of E are:

((Ax + Cx)/2, (Ay + Cy)/2) = ((5 + 1)/2, (4 - 4)/2) = (3, 0)

The coordinates of F are:

((Ax + Bx)/2, (Ay + By)/2) = ((5 - 9)/2, (4 + 6)/2) = (-2, 5)

Now, we can find the equations of medians AD, BE, and CF.

The equation of the line passing through points (x1, y1) and (x2, y2) is:

y - y1 = ((y2 - y1)/(x2 - x1))(x - x1)

Using point-slope form, we can find the equations of the lines passing through points A, B, and C that are parallel to the medians.

The equation of the line passing through A and D is:

y - 4 = ((1 - 4)/(((-9 + 1)/2) - 5))(x - 5)
y - 4 = 3/4(x - 5)
y = 3/4x - 1/4

The equation of the line passing through B and E is:

y - 6 = ((0 - 6)/(((5 + 1)/2) - (-9)))(x - (-9))
y - 6 = 6/7(x + 9)
y = 6/7x + 120/7

The equation of the line passing through C and F is:

y + 4 = ((5 - (-4))/((-2) - 1))(x - 1)
y + 4 = -3/7(x - 1)
y = -3/7x - 25/7

(b) To show that the medians all pass through the same point, we can find the point of intersection of any two of the medians and then verify that the third median also passes through that point.

Let's find the point of intersection of medians AD and BE. To do this, we need to solve the system of equations:

y = 3/4x - 1/4
y = 6/7x + 120/7

Substituting one equation into the other, we get:

3/4x - 1/4 = 6/7x + 120/7
7(3x/4 - 1/4) = 6x + 720/4 - 7
21x - 28 = 24x + 720 - 28
-3x = -720
x = 240

Substituting x = 240 into either equation, we get y = 179/2.

So, the point of intersection of medians AD and BE is (240, 179/2).

Now, let's check if the third median CF passes through this point.

Substituting x = 240 into the equation of the line passing through C

TRUE OR FALSE?
1. The Populist movement offered a critique of and challenge to industrialization, capitalism, and laissez-faire orthodoxies.

Answers

The answer to this question is true

The side elevation of this prism is a
rectangle.
Work out the width and height of
this rectangle.
23 cm
12 cm
h
18 cm
15 cm
<<-side
Side elevation
width
height
Not drawn accurately

Answers

The width and height of the rectangle is w = 23 cm and h = 18 cm

Given data ,

Let the prism be represented by the figure A

Now , the width of the prism = 23 cm

The height of the prism = 12 cm

Now , the width of the rectangle = width of prism

So , w = 23 cm

And , the height of the rectangle is = breadth of the prism = 18 cm

So , h = 18 cm

Hence , the rectangle is solved

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The area of the triangle is 35 square feet. Use a quadratic equation to find the length of the base. Round your answer to the nearest tenth.

Answers

The length of the base is 5 feet

What is the length of the base?

A quadratic equation is a second-degree polynomial equation that can be written in the form "ax² + bx + c = 0", where "x" is the variable, and "a", "b", and "c" are constants. The coefficient "a" cannot be zero, as this would result in a linear equation.

The area of a triangle is gotten from;

A = 1/2bh

2A = bh

A = 35 square feet

70= b (2b +4)

70 = 2b^2 + 4b

2b^2 + 4b - 70 = 0

b = 5 or -7

Since length can not be negative;

b = 5 feet

length = 2(5) + 4 = 14 feet

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Can you help me with this exercise

Answers

The coordinates of point P are (-3, -1).

What is the coordinate of point P?

The coordinates of point P that divides the line segment AB in the ratio 1:4 is calculated as follows;

let the ratio = a : b = 1:4

P = ( (bx₂ + ax₁)/(b + a), (by₂ +  ay₁)/( b + a) )

Where;

(x₁, y₁) and  (x₂, y₂) are the coordinates of points A and B

The coordinate of point P is calculated as follows;

P = ( (4(-2) + 1 (-7))/(4 + 1),  (4(0) + 1(-5) )/(4 + 1))

P = (-8 - 7)/(5), (0 - 5)/(5)

P = (-15/5), (-5/5)

P = (-3, - 1)

Thus, the coordinate of point P is determined by applying  ratio formula on a line segment.

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find dy and evaluate when x=−3 and dx=−0.4 for the function y=6cos(x).

Answers

When x = -3 and dx = -0.4, dy = -0.3386. This means that when x decreases by 0.4, y decreases by approximately 0.3386 units.

To find dy, we need to take the derivative of the function y=6cos(x) with respect to x. The derivative of cos(x) is -sin(x), so the derivative of 6cos(x) is -6sin(x). Therefore, dy/dx = -6sin(x).

Now, we can evaluate dy when x = -3 and dx = -0.4. Plugging in x = -3 into the derivative we just found, we get dy/dx = -6sin(-3). Using the unit circle, we know that sin(-3) is approximately equal to -0.1411. Therefore, dy/dx = -6(-0.1411) = 0.8466.

To find dy, we can use the formula dy = dy/dx * dx. Plugging in the values we have, we get dy = 0.8466 * (-0.4) = -0.3386.

Therefore, when x = -3 and dx = -0.4, dy = -0.3386. This means that when x decreases by 0.4, y decreases by approximately 0.3386 units. This information can be useful in understanding the behavior of the function y=6cos(x) in the neighborhood of x = -3.

Overall, finding the derivative of a function allows us to understand how the function changes as its input (in this case, x) changes. By evaluating the derivative at a specific point, we can find the rate of change (dy/dx) and use it to find the change in output (dy) for a given change in input (dx).

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13) rank in order, from largest to smallest, electric field strength at five points near an infinite plane of charge

Answers

The electric field strength decreases as the distance from the plane increases.

How to rank electric field strength at five points near an infinite plane of charge?

The electric field strength near an infinite plane of charge is given by:

E = σ/2ε0

where E is the electric field strength, σ is the surface charge density of the plane, and ε0 is the electric constant.

The electric field strength at a point near the plane depends on the distance from the plane and the orientation of the point relative to the plane.

Assuming that the surface charge density is constant, we can rank the electric field strength from largest to smallest based on the distance from the plane:

Point closest to the plane

Point at a distance of 2 times the distance from point 1

Point at a distance of 3 times the distance from point 1

Point at a distance of 4 times the distance from point 1

Point at a distance of 5 times the distance from point 1

This is because the electric field strength decreases as the distance from the plane increases.

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Use the region in the first quadrant bounded by √x, y=2 and the y-axis to determine the volume when the region is revolved around the line y = -2. Evaluate the integral.
A. 18.667
B. 17.97
C. 58.643
D. 150.796
E. 21.333
F. 32.436
G. 103.323
H. 27.4

Answers

To determine the volume when the region is revolved around the line y = -2, we can use the shell method. We need to integrate the circumference of a shell multiplied by its height.

The circumference of a shell with radius r and height h is given by 2πr, and the height of each shell is given by y + 2.

The first quadrant bounded by √x, y = 2 and the y-axis creates a solid that is symmetrical about y axis. We can integrate from y = 0 to y = 2 to obtain the volume of the solid.

The integral becomes:

V = ∫(2πy)((√y+2)^2)dy

After simplification, we get:

V = 32π/5 + 128π/3

The value of V is approximately 103.323

Therefore, the correct answer is (G) 103.323.

A regression model made to conform to a sample set of data, compromising predictive power is called __________.
cross-validation
flooding
overfitting
binary choice

Answers

When a regression model is created to fit a sample set of data, its prediction ability is reduced overfitting. Thus, option C is correct.

What is the regression model?

Overfitting is a phenomenon in machine learning where a regression model is trained too well on the sample data.

to the point where it starts to memorize the data instead of learning the underlying patterns or trends. As a result, the overfitted model may not generalize well to unseen data and may exhibit poor predictive power when used for making predictions on new data.

The term "compromising predictive power" in the question suggests that the model is not able to accurately predict outcomes on new, unseen data due to overfitting.

Essentially, the model becomes too specialized to the sample data it was trained on and loses its ability to generalize to new data points.

Flooding is not a term related to machine learning or regression modeling. Binary choice refers to a decision between two options and is not related to overfitting.

Therefore, When a regression model is created to fit a sample set of data, its prediction ability is reduced overfitting

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working together, evan and ellie can do the garden chores in 6 hours. it takes evan twice as long as ellie to do the work alone. how many hours does it take evan working alone?

Answers

Working together, Evan and Ellie can do the garden chores in 6 hours. it takes Evan twice as long as Ellie to do the work alone. Thus it takes Evan 18 hours to do the work alone.

Let x be the number of hours Ellie takes to do the garden chores alone. Then, Evan takes 2x hours to do the same work alone.

We can express their work rates as follows:
- Ellie's work rate: 1/x (jobs per hour)
- Evan's work rate: 1/(2x) (jobs per hour)

Now, we know that if they work together, they can do the garden chores in 6 hours. This means that their combined work rate is 1/6 of the job per hour.

When they work together, their work rates add up:
1/x + 1/(2x) = 1/6 (since they complete the work together in 6 hours)

Now, let's solve for x:
1/x + 1/(2x) = 1/6
To clear the fractions, multiply both sides by 6x:
We can solve for "x", which is Ellie's time to do the work alone:
1/6 = 3/2x
2x = 18
x = 9

So, Ellie takes 9 hours to complete the garden chores alone. Since Evan takes twice as long as Ellie, he takes 2 * 9 = 18 hours to complete the garden chores alone.

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Suppose that a body moves through a resisting medium withresistance proportional to its velocity v , so that dv/dt =-kv.
a) show that its velocity and position at time t are given by v(t)= v0e-kt and x(t) = x0 +(v0 / k)(1-e-kt).
b)Conclude that the body travels only a finite distance, and findthat distance.

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The velocity and position of a body moving through a resisting medium with resistance proportional to its velocity are given by v(t) = v₀e^(-kt) and x(t) = x₀ + (v₀/k)(1-e^(-kt)), respectively.

We are given that the resistance of the medium is proportional to the velocity of the body, so we can write

F = -kv

where F is the force acting on the body, k is the proportionality constant, and v is the velocity of the body. Since F = ma (Newton's second law), we have

ma = -kv

Dividing both sides by m and rearranging, we get

dv/dt = -k/m × v

We can now solve this differential equation by separation of variables

dv/v = -k/m × dt

Integrating both sides, we obtain

ln|v| = -k/m × t + C

where C is the constant of integration. Exponentiating both sides, we get

|v| = e^(-k/m × t + C) = e^C × e^(-k/m × t)

Note that since v is always positive (it's the speed of the body), we can drop the absolute value signs. Also, since e^C is just a constant, we can write

v = v₀ × e^(-k/m × t)

where v₀ = e^C is the velocity of the body at time t=0.

Next, we can find the position of the body by integrating the velocity

dx/dt = v

Integrating both sides, we obtain

x(t) = x₀ + ∫ v(t) dt

where x₀ is the position of the body at time t=0. Substituting v(t) = v₀ × e^(-k/m × t), we get:

x(t) = x₀ + ∫ v₀ × e^(-k/m × t) dt

Integrating, we obtain:

x(t) = x₀ - (m/k) × v₀ × e^(-k/m × t) + A

where A is the constant of integration. We can determine A by using the initial condition x(0) = x₀, which gives

x(0) = x₀ - (m/k) × v₀ × e^(0) + A

A = x₀ + (m/k) × v₀

Substituting this into the equation for x(t), we finally get

x(t) = x₀ + (v₀/k) × (1 - e^(-k/m × t))

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The given question is incomplete, the complete question is:

Suppose that a body moves through a resisting medium withresistance proportional to its velocity v , so that dv/dt =-kv. Show that its velocity and position at time t are given by v(t)= v₀e^(-kt) and x(t) = x₀ +(v₀ / k)(1-e^(-kt)).

using the wronskian, verify that the given functions form a fundamental solution set for the given differential equation and find a general solution.y^(4) - y = 0; {e^x, e^-x, cos x, sin x}

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The general solution is: y(x) = c1e^x + c2e^-x + c3cos x + c4sin x.

To verify that the functions {e^x, e^-x, cos x, sin x} form a fundamental solution set for the differential equation y^(4) - y = 0, we need to show that the Wronskian of these functions is nonzero for all x.The Wronskian of a set of functions {f1(x), f2(x), ..., fn(x)} is defined as:W(f1, f2, ..., fn)(x) = det( [f1(x), f2(x), ..., fn(x)], [f1'(x), f2'(x), ..., fn'(x)], ..., [f1^(n-1)(x), f2^(n-1)(x), ..., fn^(n-1)(x)] ),where f^(k)(x) denotes the kth derivative of f(x).For our set of functions {e^x, e^-x, cos x, sin x}, the Wronskian is:W(e^x, e^-x, cos x, sin x)(x) = det( [e^x, e^-x, cos x, sin x], [e^x, -e^-x, -sin x, cos x], [e^x, e^-x, -cos x, -sin x], [e^x, -e^-x, sin x, -cos x] ),which simplifies to:W(e^x, e^-x, cos x, sin x)(x) = 4e^xSince the Wronskian is nonzero for all x, we can conclude that the functions {e^x, e^-x, cos x, sin x} form a fundamental solution set for the differential equation y^(4) - y = 0.To find the general solution, we can use the fact that any linear combination of the fundamental solutions is also a solution. So, the general solution is:y(x) = c1e^x + c2e^-x + c3cos x + c4sin x,where c1, c2, c3, c4 are arbitrary constants.

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find whether the sequence converges or diverges a_{n} = ((- 1) ^ (n 1) * n)/(n sqrt(n))

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The given sequence [tex]a_{n}[/tex]  does not converge, but instead diverges to infinity.

What it means for sequennce to converge or diverge?

In mathematics and analysis, the terms "convergence" and "divergence" are used to describe the behavior of a sequence, which is an ordered list of numbers that are generated according to a certain pattern.

Convergence: A sequence approaches a finite limit as its terms progress, getting arbitrarily close to a single value.Divergence: A sequence does not approach a finite limit as its terms progress, and does not settle down to a single value.

[tex]\begin{}|a_n| &= \left| \frac{(-1)^{n+1} \cdot n}{n \cdot \sqrt{n}} \right| \\&= \frac{n}{\sqrt{n}} \\\lim_{{n \to \infty}} |a_n| &= \lim_{{n \to \infty}} \frac{n}{\sqrt{n}} \\&= \lim_{{n \to \infty}} \frac{\sqrt{n} \cdot \sqrt{n}}{\sqrt{n}} \\&= \lim_{{n \to \infty}} \sqrt{n}\end{align*}[/tex]

As n approaches infinity, √n also approaches infinity. Therefore, the limit of ∣[tex]a_{n}[/tex]| as n approaches infinity is also infinity.

Since, the absolute value of the sequence |[tex]a_{n}[/tex]| approaches infinity as

n approaches infinity, the sequence [tex]a_{n}[/tex] does not converge, but instead diverges to infinity.

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Correct Question:find whether the sequence converges or diverges [tex]\begin{}|a_n| &= \left| \frac{(-1)^{n+1} \cdot n}{n \cdot \sqrt{n}} \right| \\&[/tex] ?

The given sequence [tex]a_{n}[/tex]  does not converge, but instead diverges to infinity.

What it means for sequennce to converge or diverge?

In mathematics and analysis, the terms "convergence" and "divergence" are used to describe the behavior of a sequence, which is an ordered list of numbers that are generated according to a certain pattern.

Convergence: A sequence approaches a finite limit as its terms progress, getting arbitrarily close to a single value.Divergence: A sequence does not approach a finite limit as its terms progress, and does not settle down to a single value.

[tex]\begin{}|a_n| &= \left| \frac{(-1)^{n+1} \cdot n}{n \cdot \sqrt{n}} \right| \\&= \frac{n}{\sqrt{n}} \\\lim_{{n \to \infty}} |a_n| &= \lim_{{n \to \infty}} \frac{n}{\sqrt{n}} \\&= \lim_{{n \to \infty}} \frac{\sqrt{n} \cdot \sqrt{n}}{\sqrt{n}} \\&= \lim_{{n \to \infty}} \sqrt{n}\end{align*}[/tex]

As n approaches infinity, √n also approaches infinity. Therefore, the limit of ∣[tex]a_{n}[/tex]| as n approaches infinity is also infinity.

Since, the absolute value of the sequence |[tex]a_{n}[/tex]| approaches infinity as

n approaches infinity, the sequence [tex]a_{n}[/tex] does not converge, but instead diverges to infinity.

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Correct Question:find whether the sequence converges or diverges [tex]\begin{}|a_n| &= \left| \frac{(-1)^{n+1} \cdot n}{n \cdot \sqrt{n}} \right| \\&[/tex] ?

how much more money will you make if you invest $740 at 5.1% interest compounded contiuously for 12 years than if he same amount was invested at 5.1% compounded daily for the same amount of time?

Answers

The amount of money we can make is $0.05.

We have,

P= $710

R= 5.1%

T= 12 year

Compounded Continuously:

A = P[tex]e^{rt[/tex]

A = 710.00(2.71828[tex])^{(0.051)(12)[/tex]

A = $1,309.32

Compounded Daily:

A = P(1 + r/n[tex])^{nt[/tex]

A = 710.00(1 + 0.051/365[tex])^{(365)(12)[/tex]

A = 710.00(1 + 0.00013972602739726[tex])^{(4380)[/tex]

A = $1,309.27

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A poll agency reports that 48% of teenagers aged 12-17 own smartphones. A random sample o 150 teenagers is drawn. Round your answers to four decimal places as needed. Part 1 Find the mean. The mean gp is 0.48- Part 2 Find the standard deviation σ . The standard deviation ơB is 0.0408] Part 3 Find the probability that more than 50% of the sampled teenagers own a smartphone. The probability that more than 50% of the sampled teenagers own a smartphone is 3120 . Part 4 out of 6 Find the probability that the proportion of the sampled teenagers who own a smartphone is between 0.45 and 0.55 The probability that the proportion of the sampled teenagers who own a smartphone is between 0.45 and 0.55 is

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The probability that the proportion of sampled teenagers who own a smartphone is between 0.45 and 0.55 is:

0.9564 - 0.2296 ≈ 0.7268

What is Probability ?

Probability is a measure of the likelihood or chance of an event occurring. It is expressed as a number between 0 and 1, where 0 represents impossibility (an event that can never occur) and 1

Part 1: The mean is calculated as:

mean = gp = 0.48

Part 2: The standard deviation is calculated as:

σ = √[(gp * (1 - gp))÷n]

where n is the sample size.

σ = √[(0.48 * 0.52)÷150]

σ ≈ 0.0408

Part 3: To find the probability that more than 50% of the sampled teenagers own a smartphone, we need to calculate the z-score and use a standard normal distribution table. The z-score is calculated as:

z = (x - gp)÷σ

where x is the proportion of teenagers owning smartphones. We want to find the probability that x is greater than 0.50. So,

z = (0.50 - 0.48)÷0.0408 ≈ 0.49

Using a standard normal distribution table, the probability corresponding to a z-score of 0.49 is approximately 0.3120.

Part 4: To find the probability that the proportion of sampled teenagers who own a smartphone is between 0.45 and 0.55, we need to standardize the range of values using the z-score formula:

z1 = (0.45 - 0.48)÷0.0408 ≈ -0.74

z2 = (0.55 - 0.48)÷0.0408 ≈ 1.71

Using a standard normal distribution table, the probability corresponding to a z-score of -0.74 is approximately 0.2296, and the probability corresponding to a z-score of 1.71 is approximately 0.9564.

Therefore, the probability that the proportion of sampled teenagers who own a smartphone is between 0.45 and 0.55 is:

0.9564 - 0.2296 ≈ 0.7268

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The price of one share of Coca Cola stock was tracked over a 14 day trading period. The price can be approximated by C(x) = 0.0049x3 – 0.1206x2 + 0.839x + 48.72, where x denotes the day in the trading period (domain in [1, 14]) and C is the price of one share in $. 3. Use calculus to discuss the extrema for the price of one share of Coca Cola stock over the 14 day period. Identify the points as maximum/minimum and relative/absolute. 4. Use calculus to determine the point of inflection. What is the meaning of the point of inflection in the context of this problem?

Answers

The point of inflection is at x = 8.19

To discuss the extrema of the function[tex]C(x) = 0.0049x^3 -0.1206x^2 + 0.839x + 48.72[/tex],

we will take the first and second derivatives with respect to x:

[tex]C'(x) = 0.0147x^2 - 0.2412x + 0.839[/tex]

[tex]C''(x) = 0.0294x – 0.2412[/tex]

Setting C'(x) = 0 to find critical points:

[tex]0.0147x^2 - 0.2412x + 0.839 = 0[/tex]

Using the quadratic formula, we can solve for x:

[tex]x=\frac{ [0.2412 ± \sqrt{(0.2412)^{2}-4(0.0147)(0.839) }] }{2(0.147)}[/tex]

x ≈ 4.27, 11.50

We also note that C''(x) > 0 for all x, which means that the function is concave up everywhere.

Therefore, we have two critical points: x = 4.27 and x = 11.50. To determine whether these are maxima or minima, we can use the second derivative test.

C''(4.27) ≈ 0.356 > 0, so x = 4.27 is a relative minimum.

C''(11.50) ≈ 0.323 > 0, so x = 11.50 is a relative minimum.

Since the function is concave up everywhere, these relative minima are also absolute minima.

To find the point of inflection, we set C''(x) = 0:

0.0294x – 0.2412 = 0

x ≈ 8.19

The point of inflection is at x = 8.19, and its meaning in the context of this problem is that it represents the day when the rate of change of the stock price changes from decreasing to increasing. Before the point of inflection, the rate of decrease of the stock price is slowing down, while after the point of inflection, the rate of increase of the stock price is accelerating

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