f(x) = 3x²-5x+4
find f(-9)
Step-by-step explanation:
put in -9 where 'x' is and compute
f(-9) = 3 ( -9)^2 -5 ( -9) + 4
= 3 (81) + 45 + 4
= 292
[tex]\sf f(-9) = 292.[/tex]
Step-by-step explanation:1. Write the fuction substituting "x" by "-9".[tex]\sf f(-9) = 3(-9)^{2} -5(-9)+4[/tex]
2. Solve the exponent.[tex]\sf f(-9) = 3(-9*-9) -5(-9)+4\\ \\f(-9) = 3(81) -5(-9)+4[/tex]
3. Solve all multiplications.[tex]\sf f(-9) = 243 -(-45)+4\\ \\f(-9) = 243+45+4[/tex]
4. Solve additions.[tex]\sf f(-9) = 292.[/tex]
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Two trains, Train A and Train B, weigh a total of 492 tons. Train A is heavier than Train B. The difference of their weights is 324 tons. What is the weight of each train?
Answer:
84 tons
Step-by-step explanation:
Let's assume that Train B weighs x tons.
According to the problem, Train A is heavier than Train B, so we can express the weight of Train A in terms of x + 324.
We know that the total weight of both trains is 492 tons, so we can set up an equation:
x + (x + 324) = 492
Simplifying this equation:
2x + 324 = 492
2x = 168
x = 84
So Train B weighs 84 tons.
We can now find the weight of Train A by adding the difference between their weights (324 tons) to the weight of Train B:
Train A = Train B + 324 = 84 + 324 = 408
Therefore, Train A weighs 408 tons and Train B weighs 84 tons.
Answer:
Train A =408
Train B = 84
Step-by-step explanation:
This is a math problem that can be solved by using a system of equations. Let x be the weight of Train A and y be the weight of Train B. Then we have:
x + y = 492 x - y = 324
Adding these two equations, we get:
2x = 816 x = 408
Substituting x into the first equation, we get:
408 + y = 492 y = 84
Therefore, Train A weighs 408 tons and Train B weighs 84 tons.
HOPE THAT HELPS! :D
Assume that in your hand you hold an ordinary six-sided die and a dime. You toss both the die and the dime on a table. Answer the following:
(Enter probabilities in decimal form and rounded out to 4 decimal places.)
a. What is the probability that a tails appears on the dime and a 1 on the die?
Spell check
b. What is the probability that a tail appears on the dime and any number 4 or greater on the die?
Spell check
c. What is the probability that a number greater than 2 appears on the die?
Spell check
d. What is the probability that a head appears on the dime or you throw a 3 on the die?
a. The probability that a tails appears on the dime and a 1 on the die is 0.0833. To find this, you need to multiply the probabilities of each individual event: P(tails) = 0.5 and P(1 on die) = 1/6. So, 0.5 * (1/6) = 0.0833.
b. The probability that a tail appears on the dime and any number 4 or greater on the die is 0.2500. First, find the probability of getting a 4 or greater on the die: P(4 or greater) = 3/6 = 0.5. Then multiply by P(tails): 0.5 * 0.5 = 0.2500.
c. The probability that a number greater than 2 appears on the die is 0.6667. There are 4 numbers greater than 2 (3, 4, 5, and 6), so the probability is 4/6 = 0.6667.
d. The probability that a head appears on the dime or you throw a 3 on the die is 0.5833. To find this, add the individual probabilities and subtract the probability of both events happening: P(heads) = 0.5, P(3 on die) = 1/6, and P(heads and 3 on die) = 0.0833. So, 0.5 + (1/6) - 0.0833 = 0.5833.
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O is the center of the regular nonagon below. Find its area. Round to the nearest tenth if necessary.
The area of the nonagon, given the radius, can be found to be 436. 28 units ²
How to find the area ?The formula to find the area is:
Area = ( Perimeter × Apothem ) / 2
Perimeter is:
P = 9 × s
P = 9 x ( 2 × 13 × sin ( 180° / 9)
= 72. 738
Apothem :
= r × cos ( 180 ° / n)
= 13 × cos ( 180 ° / 9)
= 11. 972
The area is:
= ( 72. 738 × 11. 972) / 2
= 436. 28 units ²
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refer to table 13-4. what is the marginal product of the second worker? a. 22.5 students b. 25 students c. 20 students d. 15 students
The marginal product of the second worker is 25 students.
What is the marginal product?
The extra product that is created as a result of including an additional unit of input is referred to as a marginal product. A marginal product, then, is a change in the production output brought on by a change in the production input.
When all other units remain constant, marginal production is the additional output that a business produces by adding one additional labour unit. You can enhance the quantity of product you create by introducing new factors of production.
Marginal product of n th worker =total output of n workers - total output of n-1 workers
MP(n)=TP(n)-TP(n-1)
MP(2)=45-20
=25 units
Thus, The marginal product of the second worker is 25 students.
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Based on years of weather data, the expected low temperature T (in degrees F) in Fairbanks, Alaska, can be approximated by T=36 sin [2pi/365(t-101)]+14, where t is in days and t=0 corresponds to January 1. Predict when the coldest day of the year will occur.
Therefore, the coldest day of the year in Fairbanks, Alaska, based on this model, is predicted to occur on October 11 (since t=0 corresponds to January 1, the 283rd day of the year is October 11).
To find the coldest day of the year, we need to find the minimum value of the function T, which represents the expected low temperature in Fairbanks, Alaska.
We can start by finding the derivative of the function with respect to t:
[tex]d(T)/dt = 36 * cos[2\pi/365(t-101)] * 2\pi/365[/tex]
Setting this derivative equal to zero and solving for t will give us the values of t that correspond to the minimum and maximum temperatures.
[tex]0 = 36 * cos[2\pi/365(t-101)] * 2\pi/365[/tex]
[tex]cos[2\pi /365(t-101)] = 0[/tex]
[tex]2pi/365(t-101) = pi/2 + n*\pi[/tex], where n is an integer.
[tex]t-101 = 182.5 + 365n[/tex]
[tex]t = 283.5 + 365n[/tex]
This equation gives us the values of t that correspond to the days when the minimum and maximum temperatures occur. We can see that the smallest value of t is obtained when n=0, which gives:
[tex]t = 283.5[/tex]
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determine whether the series is convergent or divergent. [infinity] n8 n9 3 n = 1
The series you're referring to is the sum from n=1 to infinity of (n⁸)/(3n⁹). To determine if it is convergent or divergent, we can use the Ratio Test.
Step 1: Compute the ratio of consecutive terms: (a_(n+1))/a_n = ((n+1)⁸)/(3(n+1)⁹) * (3n⁹)/(n⁸).
Step 2: Simplify the ratio: ((n+1)⁸)/(3(n+1)⁹) * (3n⁹)/(n⁸) = (n+1)⁸/(n+1)⁹ * (n⁹)/(n⁸) = 1/((n+1)(n)).
Step 3: Take the limit as n approaches infinity: lim (n→∞) 1/((n+1)(n)) = 0.
Since the limit is less than 1, the series converges by the Ratio Test.
In summary, the series ∑(n=1 to ∞) (n⁸)/(3n⁹) is convergent. The Ratio Test is used to determine this, by finding the limit of the ratio of consecutive terms, which is less than 1.
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PLEASE HELP ME
A deli is trying out new labels for their cylindrical-shaped wheels of cheese. The label covers the entire wheel except the circular top and bottom.
If the wheel has a radius of 22 centimeters and a height of 16 centimeters, how many square centimeters of the wheel does the label cover? (Approximate using pi equals 22 over 7)
15,488 over 7 square centimeters
36,784 over 7 square centimeters
1,936 over 7 square centimeters
340,736 over 7 square centimeters
The label covers 11,936 over 7 square centimeters of the wheel.
The cylindrical-shaped wheel of cheese has a radius of 22 centimeters and a height of 16 centimeters. The label covers the entire wheel except the circular top and bottom. Therefore, the area covered by the label is the lateral surface area of the cylinder.
The lateral surface area of a cylinder can be calculated using the formula 2πrh, where r is the radius of the base, h is the height, and π is approximately equal to 22/7.
Substituting the given values, we get:
Lateral surface area = 2 × (22/7) × 22 × 16
Lateral surface area = (44/7) × 22 × 16
Lateral surface area = 1,936 square centimeters (approx.)
Therefore, the label covers approximately 1,936/7 square centimeters of the wheel. The closest option is (C) 1,936 over 7 square centimeters.
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Let be the quadratic surface given by 4x^2−y ^2− 2z^2= 10.
(a) Find the upward-pointing unit normal to at (2,2,1). (Write your solution using the standard basis vectors ,,. Use symbolic notation and fractions where needed.)
(b) Find an equation of the tangent plane Pto at the point (2,2,1)
(a) To find the upward-pointing unit normal vector at (2,2,1), we need to compute the gradient of the quadratic surface given by 4x² - y² - 2z² = 10.
The gradient is given by:
∇f = <∂f/∂x, ∂f/∂y, ∂f/∂z>
∇f = <8x, -2y, -4z>
At point (2,2,1), the gradient is:
∇f(2,2,1) = <16, -4, -4>
To find the upward-pointing unit normal, we normalize this vector and ensure the z-component is positive:
Unit normal = <16, -4, -4> / |<16, -4, -4>| = <16/18, -4/18, -4/18> = <8/9, -2/9, -2/9>
(b) To find the equation of the tangent plane P at (2,2,1), use the point-normal form of a plane equation:
P: (x - x₀, y - y₀, z - z₀) · <8/9, -2/9, -2/9> = 0
Substitute the point (2,2,1):
P: (x - 2, y - 2, z - 1) · <8/9, -2/9, -2/9> = 0
Expanding this equation, we get:
P: 8(x-2)/9 - 2(y-2)/9 - 2(z-1)/9 = 0
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A cylinder has a base radius of 5 cm and a height of 17 cm what is its volume in cubic centimeters, to the nearest tenths place?
[tex]\textit{volume of a cylinder}\\\\ V=\pi r^2 h~~ \begin{cases} r=radius\\ h=height\\[-0.5em] \hrulefill\\ r=5\\ h=17 \end{cases}\implies V\pi (5)^2(17)\implies V\approx 1335.2~cm^3[/tex]
perform a first derivative test on the function f(x)=2x^3+3x^2-120x+4; [-5,8]
A) Locate the criticalpoints of the given function
B) Use the first derivative test to locate the local maximum and minimum values.
C) Identify the absolute minimum and maximum values of the function on the given interval (when they exist)
The critical points of the function f(x) = 2x^3 + 3x^2 - 120x + 4 on the interval [-5, 8] are x = -5 and x = 4. The function has a local minimum at x = -5 and a local maximum at x = 4. The absolute minimum value of the function on the interval is 9, and the absolute maximum value is 3484.
To locate the critical points, we need to find the values of x where the derivative of the function f(x) is zero or undefined. So, let's first find the derivative of f(x)
f'(x) = 6x^2 + 6x - 120
Setting f'(x) = 0, we get
6x^2 + 6x - 120 = 0
Simplifying this equation, we get
x^2 + x - 20 = 0
Factoring the equation, we get
(x + 5)(x - 4) = 0
Therefore, the critical points are x = -5 and x = 4.
To use the first derivative test to locate the local maximum and minimum values, we need to evaluate the sign of f'(x) on either side of the critical points. Let's create a sign chart for f'(x)
x -5 -4 4 8
f'(x) -30 -54 72 174
From the sign chart, we can see that f'(x) changes sign from negative to positive at x = -5, indicating a local minimum at x = -5. Similarly, f'(x) changes sign from negative to positive at x = 4, indicating a local maximum at x = 4.
To identify the absolute minimum and maximum values of the function on the given interval, we need to evaluate the function at the critical points and the endpoints of the interval. So, let's calculate the function values
f(-5) = 9
f(4) = 420
f(8) = 3484
Therefore, the absolute minimum value of the function on the interval [-5, 8] is f(-5) = 9, and the absolute maximum value is f(8) = 3484.
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Provide the rejection region for the Wilcoxon signed rank test (not rank sum test) for each of the following sets of hypotheses: (a) H0 : M=0 versus Ha : M≠ 0 with n=19 and α=0.05 (b) H0 : M <= 0 versus Ha : M > 0 with n=8 and α=0.025 (c) H0 : M >= 0 versus Ha : M < 0 with n=14 and α=0.01
(a) Rejection region: Reject H0 if the calculated test statistic falls below the lower critical value or above the upper critical value at α/2 = 0.025.
(b) Rejection region: Reject H0 if the calculated test statistic exceeds the upper critical value at α = 0.025.
(c) Rejection region: Reject H0 if the calculated test statistic falls below the lower critical value at α = 0.01.
We have,
To determine the rejection region for the Wilcoxon signed rank test, we need to consider the sample size (n), the alternative hypothesis (Ha), and the significance level (α).
The rejection region consists of the critical values that, if exceeded, would lead to the rejection of the null hypothesis (H0).
Here are the rejection regions for each set of hypotheses:
(a)
H0: M = 0 versus Ha: M ≠ 0, n = 19, α = 0.05:
The rejection region consists of the lower and upper critical values of the Wilcoxon signed rank test at significance level α/2 = 0.05/2 = 0.025.
(b)
H0: M ≤ 0 versus Ha: M > 0, n = 8, α = 0.025:
The rejection region consists of the upper critical value of the Wilcoxon signed rank test at significance level α = 0.025.
(c)
H0: M ≥ 0 versus Ha: M < 0, n = 14, α = 0.01:
The rejection region consists of the lower critical value of the Wilcoxon signed rank test at significance level α = 0.01.
Thus,
(a) Rejection region: Reject H0 if the calculated test statistic falls below the lower critical value or above the upper critical value at α/2 = 0.025.
(b) Rejection region: Reject H0 if the calculated test statistic exceeds the upper critical value at α = 0.025.
(c) Rejection region: Reject H0 if the calculated test statistic falls below the lower critical value at α = 0.01.
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7
A linear function has a slope of -g and a y-intercept of 3. How does this function compare to the linear function that is
represented by the equation y+11--(x-18)?
O It has the same slope and the same y-intercept.
OIt has the same slope and a different y-intercept.
O It has the same y-intercept and a different slope.
O It has a different slope and a different y-intercept.
Comparing the two functions, we see that they have the same slope (-7/g), but different y-intercepts (3 vs 145/g). Therefore, the correct answer is: It has the same slope and a different y-intercept, which is option (b).
What is linear function?A linear function is a numerical capability that can be addressed by a straight line on a chart.
It has the structure y = mx + b, where m is the slant of the line and b is the y-catch.
Modeling relationships between two variables with a constant rate of change is done with the help of linear functions.
The linear function with a slope of -7/g and a y-intercept of 3 can be represented by the equation y = (-7/g)x + 3.
The linear function represented by the equation y + 11 = (-7/g)(x - 18) can be rewritten in slope-intercept form as y = (-7/g)x + 145/g.
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A population of rabbits on a farm grows by 12% each year. Define a sequence {rn} describing the rabbit population at the end of each year. Suppose that the sequence starts with r0 = 30.
(a) Give a mathematical expression for r12. (You don't have to actually compute the number.)
(b) If each rabbit consumes 10 pounds of rabbit food each year, then how much rabbit food is consumed in 10 years? For simplicity, you can omit the food consumed by the baby rabbits born in a given year. For example, suppose the farm starts tabulating rabbit food on January 1, 2012 at which time the rabbit population is 30. You will count the food consumed by those 30 rabbits during 2012. You won't count the food consumed by the rabbits born in 2012 until after January 1, 2013. Again, you don't have to compute the number, but you do have to give a closed form (without the summation) mathematical expression for the number.
The population of rabbits on a farm grows by 12% each year. The sequence starts with r0 = 30.
(a) A mathematical expression for r12 is r12 = (1 + 0.12)r11 = [tex](1 + 0.12)(1 + 0.12)^{10}(30)[/tex] = [tex](1 + 0.12)^{11}(30)[/tex]
(b) If each rabbit consumes 10 pounds of rabbit food each year, then rabbit food consumed in 10 years is 10(r0(1 - [tex](1 + 0.12)^{10})[/tex] / -0.12) = [tex]10(30(1 - (1 + 0.12)^{10})[/tex] / -0.12)
To define the sequence {rn}, we can use the formula:
rn = (1 + 0.12)rn-1
where rn-1 is the rabbit population at the end of the previous year.
Starting with r0 = 30, we can calculate the population at the end of each year:
r1 = (1 + 0.12)r0 = 33.6
r2 = (1 + 0.12)r1 = 37.632
r3 = (1 + 0.12)r2 = 42.150144
...
rn = (1 + 0.12)rn-1
(a) To find a mathematical expression for r12, we can use the formula:
r12 = (1 + 0.12)r11
where r11 is the rabbit population at the end of the 11th year:
r11 = (1 + 0.12)r10 = [tex](1 + 0.12)^{10}r0[/tex]
Substituting r0 = 30, we get:
r11 = [tex](1 + 0.12)^{10}(30)[/tex]
Therefore, the mathematical expression for r12 is:
r12 = (1 + 0.12)r11 = [tex](1 + 0.12)(1 + 0.12)^{10}(30)[/tex] = [tex](1 + 0.12)^{11}(30)[/tex]
(b) The total amount of rabbit food consumed in 10 years can be expressed as:
10(r0 + r1 + r2 + ... + r9)10
To simplify the expression, we can use the formula for the sum of a geometric sequence:
r0[tex](1 - (1 + 0.12)^{10})[/tex] / (1 - (1 + 0.12)) = r0[tex](1 - (1 + 0.12)^{10})[/tex] / -0.12
Substituting r0 = 30, we get:
10(r0 + r1 + r2 + ... + r9) = [tex]10(r0(1 - (1 + 0.12)^{10})[/tex] / -0.12)
Therefore, the closed-form mathematical expression for the amount of rabbit food consumed in 10 years is:
10(r0(1 - [tex](1 + 0.12)^{10})[/tex] / -0.12) = [tex]10(30(1 - (1 + 0.12)^{10})[/tex] / -0.12)
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let b = {(1, 2, 1), (0, 1, 1), (0, 1, 0) } and b′ = {(0, 1, 0), (−1, 1, −1), (2, 1, −1) } be ordered bases in r3.
The transformation matrix T from b to b' is:
T = [[0, -1/3, 2/3],[1, 1/3, 1/3],[0, -1/3, -1/3]]This can be obtained by writing the coordinates of the basis vectors of b' as linear combinations of the basis vectors of b and forming a matrix with these coefficients.
To find the transformation matrix from one ordered basis to another, we need to express the coordinates of the basis vectors of the new basis (b') as linear combinations of the basis vectors of the old basis (b). The columns of the transformation matrix T are these coefficients.
To obtain these coefficients, we solve the system of equations T[v] = [v'] for each basis vector v of b', where v' are the coordinates of v in b'. This results in a matrix T where each column represents the coefficients of a basis vector of b' expressed in terms of the basis vectors of b.
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calculate the height of the building to the nearest tenth of a foot
the height of the building to the nearest tenth of a foot is 78. 0 feet
How to determine the valueUsing the tangent identity, we have that;
tan θ = opposite/adjacent
Now, substitute the values, we get;
tan 35 = x/150
cross multiply the values, we have;
x = 105. 0ft; this is the hypotenuse side
Then, we have that;
Using the sine identity;
sin 48 = h/105
cross multiply the values
h = 78. 0 feet
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Suppose a math class contains 35 students, 21 females (two of whom speak French) and 14 males (six of whom speak French). Compute the probability that a randomly selected student speaks French, given that the
student is female.
_________
The probability that a randomly selected student speaks French, given that the student is female, is 3/20.
How to Compute the probability that a randomly selected student speaks French, given that the student is female.The probability that a randomly selected student speaks French given that the student is female can be found using Bayes' theorem.
Let F be the event that a student speaks French, and let G be the event that a student is female. Then, we want to find P(F | G), the probability that a student speaks French given that the student is female.
We know that P(F) is the overall probability that a student speaks French, regardless of gender. This can be computed using the total number of French-speaking students divided by the total number of students:
P(F) = (2 + 6) / 35 = 8 / 35
We also know that P(G) is the overall probability that a student is female. This can be computed using the total number of female students divided by the total number of students:
P(G) = 21 / 35 = 3 / 5
Finally, we need to find P(G | F), the probability that a student is female given that the student speaks French. This can be computed using the formula for conditional probability:
P(G | F) = P(F | G) * P(G) / P(F)
We are given that six of the French-speaking students are male, so the remaining two must be female. Therefore, P(F | G) = 2 / 21. Substituting in the values we have computed, we get:
P(G | F) = (2 / 21) * (3 / 5) / (8 / 35) = 3 / 20
Therefore, the probability that a randomly selected student speaks French, given that the student is female, is 3/20.
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Pls help (part 1)
Find the volume!
Give step by step explanation!
The requried volume of the triangular prism with the cylindrical hole is 2808 cm³.
The volume of the triangular prism without cylindrical whole is given as:
Volume = Area of triangular face * length of the prism
Volume = 25 * [1/2*15*20]
Volume = 3750 cm³
The volume of the cylindrical holes:
Volume = πr²h
= 3.14*[4/2]²*25 = 314 cm³
Now, the volume of the triangular prism with the cylindrical hole is,
Volume = 3750 - 3 * 314
= 2808 cm³
Thus, the requried volume of the triangular prism with the cylindrical hole is 2808 cm³.
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give the rank and nullity of the matrix. a = 1 1 −4 0 2 1 1−1 −5
rank a=
nullity a=
Given matrix:
a = |1 1 −4|
| 0 2 1 |
| 1−1 −5|
The rank of A is 2 and the nullity of A is 1.
Rank and nullityTo find the rank and nullity of the matrix A, we first need to put the matrix in row-echelon form. The given matrix A is:
A = | 1 1 -4 |
| 0 2 1 |
| 1 -1 -5 |
Step 1: Subtract the first row from the third row:
A = | 1 1 -4 |
| 0 2 1 |
| 0 -2 -1 |
Step 2: Add the third row to the second row:
A = | 1 1 -4 |
| 0 0 0 |
| 0 -2 -1 |
Since we cannot simplify this matrix further, this is the row-echelon form of A.
Now, let's find the rank and nullity.
The rank of a matrix is the number of linearly independent rows or the number of non-zero rows in its row-echelon form. In this case, there are two non-zero rows, so the rank of A is 2.
The nullity of a matrix is the number of free variables or the difference between the number of columns and the rank. In this case, there are 3 columns and the rank is 2, so the nullity of A is 3 - 2 = 1.
Therefore, the rank of A is 2 and the nullity of A is 1.
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find the area between y = 2 and y = ( x − 1 ) 2 − 4 with x ≥ 0 . if needed, round your limits of integration and answer to 2 decimal places.
Area between the curves is approximately 9.80 square units.
The area between y = 2 and y = (x-1)² - 4 with x ≥ 0 can be found using the definite integral. First, find the points of intersection, then integrate the difference of the functions between these points, and round the result to 2 decimal places if needed.
To find the points of intersection, set the two functions equal to each other:
2 = (x-1)² - 4
Solve for x:
(x-1)² = 6
x-1 = ±√6
x = 1 ± √6
The points of intersection are x = 1 - √6 ≈ -1.45 and x = 1 + √6 ≈ 3.45.
Now, integrate the difference of the functions between these points:
Area = ∫[-1.45, 3.45] (2 - ((x-1)² - 4)) dx
Evaluate the integral, and round the result to 2 decimal places:
Area ≈ 9.80 square units.
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which of these equations is produced as a step when the euclidean algorithm is used to find the gcd of given integers? (11,1)
Multiple Choice a. 1 =1 0+1 b. 1 = 11 0+1 c. 11 = 11 1+0 d. 11 = 11 0 +11
The correct answer is d. 11 = 11 0 +11 and option (a). This equation is produced as a step when using the Euclidean algorithm to find the greatest common divisor (gcd) of the given integers (11,1).
In this step, we divide 11 by 1 and get a quotient of 11 with a remainder of 0, represented by the equation 11 = 11(1) + 0. This means that 11 is the gcd of 11 and 1. The Euclidean algorithm finds the greatest common divisor (GCD) of two given integers. In this case, the integers are 11 and 1. Here's the step-by-step explanation:
1. Divide the larger integer (11) by the smaller integer (1).
2. Check the remainder. If the remainder is 0, the smaller integer (1) is the GCD.
3. If the remainder is not 0, repeat the process with the smaller integer (1) and the remainder.
Since 1 is a divisor of every integer, the GCD of (11, 1) is 1. The equation that represents this step in the Euclidean algorithm is:
a. 1 = 1 * 0 + 1
So, the correct answer is an option (a).
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Mitchell bought 600 shares of Centerco two years ago for $34.50 per share. He sold them yesterday for $38.64 per share.
a. What was the percent increase in the price per share?
(Round to the nearest tenth of a percent.)
b. What was the total purchase price for the 600 shares?
c. What was the total selling price for the 600 shares?
d. What was the percent capital gain for the 600 shares?
(Round to the nearest tenth of a percent.)
e. How does the percent increase in the price of one share compare to the percent capital gain for all 600 shares?
Answer:
Total purchase price = 600 * 34.50 Total purchase price = $20,700 c. To find the total selling price for the 600 shares, we can multiply the number of shares by the final price per share. Total selling price = 600 * 38.64 Total selling price = $23,184 d.
suppose f is continuous on [1,12] and differentiable on (1,12). if 11≤f′(x)≤13 for all values of x∈(1,12), what is the range of possible values of f(12)−f(1)?
The range of possible values for f(12) - f(1) is [110, 156].
How to find the range of possible values of f(12)−f(1)?For the range of possible values for f(12) - f(1),using the Mean Value Theorem, we know that there exists a c in (1,12) such that:
f(12) - f(1) = (12 - 1) f'(c)
Since we know that 11 ≤ f'(x) ≤ 13 for all x in (1,12), we can use these bounds to find the range of possible values for f(12) - f(1):
11 ≤ f'(c) ≤ 13
11(12-1) ≤ (12-1)f'(c) ≤ 13(12-1)
110 ≤ f(12) - f(1) ≤ 156
Therefore, the range of possible values for f(12) - f(1) is [110, 156].
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find the matrix a of the rotation about the y -axis through an angle of π2, counterclockwise as viewed from the positive y -axis. a= [ ] .
To find the matrix a of the rotation about the y-axis through an angle of π/2 counterclockwise as viewed from the positive y-axis, we can use the following formula:
a = [ cos(θ), 0, sin(θ) ] [ 0, 1, 0 ] [-sin(θ), 0, cos(θ) ] where θ is the angle of rotation.
In this case, θ = π/2, so we have: a = [ cos(π/2), 0, sin(π/2) ] [ 0, 1, 0 ] [-sin(π/2), 0, cos(π/2) ]
Simplifying this, we get: a = [ 0, 0, 1 ] [ 0, 1, 0 ] [-1, 0, 0 ]
Therefore, the matrix a of the rotation about the y-axis through an angle of π/2 counterclockwise as viewed from the positive y-axis is: a = [ 0, 0, 1 ] [ 0, 1, 0 ] [-1, 0, 0 ]
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What is the explicit formula represented by this graph (4,9) (3,7) (2,5) (1,3)
Answer:
y = 2x + 1
Step-by-step explanation:
To find the explicit formula represented by the given points, we can use the slope-intercept form of a linear equation, which is y = mx + b, where m is the slope and b is the y-intercept.
First, let's find the slope using any two points from the given points:
Slope = (change in y) / (change in x) = (7-9)/(3-4) = -2/-1 = 2
Now we have the slope (m = 2). We can use any of the points and the slope to find the y-intercept (b).
Using the point (4,9):
y = mx + b
9 = 2(4) + b
9 = 8 + b
b = 1
Therefore, the explicit formula represented by the graph is:
y = 2x + 1
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given the matrix A= [ c,4,-4 c,-2,4 -4,0,c]
find all values of for which the matrix is singular. enter the values of as a comma-separated list:
If the given matrix is A= [ c,4,-4 c,-2,4 -4,0,c], then there are no real values for which the matrix A is singular.
Explanation:
To find the values of c for which the matrix A is singular, follow these steps:
Step 1: we need to find when its determinant is equal to zero. The matrix A is given as:
A = | c 4 -4 |
| c -2 4 |
|-4 0 c |
Step 2: Now, we need to calculate the determinant of A:
det(A) = c(((-2)c) - (4*0)) - 4((c*c) - (4*-4)) - 4((c*0) - (-4*-2))
det(A) = c(-2c) - 4(c^2 + 16) - 4(8)
det(A) = -2c^2 - 4c^2 - 64 + 32
det(A) = -6c^2 - 32
Step 3: Now, set the determinant equal to zero and solve for c:
0 = -6c^2 - 32
Divide by -6:
0 = c^2 + 32/6
0 = c^2 + 16/3
c^2= - 16/3
As there are no real values of c that satisfy this equation, there are no real values for which the matrix A is singular.
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what is the profitability index (pi) of a project with an initial investment of $194,000 and a net present value of –$68,000?
The profitability index for this project is approximately 0.65, indicating that it may not be a favorable investment as the PI is less than 1.
The profitability index (PI) is a ratio that measures the present value of future cash flows of a project per dollar of initial investment.
To calculate the PI of a project with an initial investment of $194,000 and a net present value of -$68,000, you would divide the present value of future cash flows by the initial investment.
PI = Present Value of Future Cash Flows / Initial Investment
Since the net present value is negative, we can assume that the present value of future cash flows is less than the initial investment.
PI = (-$68,000) / $194,000
PI = -0.35
The PI of the project is negative (-0.35), which means that the project is not expected to be profitable and may result in a net loss. Therefore, it may not be a wise investment decision.
The profitability index (PI) is a financial metric used to evaluate the attractiveness of an investment. It is calculated by dividing the present value of future cash flows by the initial investment. In this case, the initial investment is $194,000 and the net present value (NPV) is -$68,000. To calculate the PI:
PI = (NPV + Initial Investment) / Initial Investment
PI = (-$68,000 + $194,000) / $194,000
PI = $126,000 / $194,000
PI ≈ 0.65
The profitability index for this project is approximately 0.65, indicating that it may not be a favorable investment as the PI is less than 1.
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Let A and k be positive constants. Which of the given functions is a solution to dy/dt = k(Ay - 1)? A. y = A^-1 + Ce^Akt B. y = A + Ce^-kt C. y = A + Ce^kt D. y = -A + Ce^-kt E. y = -A + Ce^kt F. y = A^-1 + Ce^Akt
The function y = A + Ce^(kt) is a solution to the differential equation dy/dt = k(Ay - 1) with A and k being positive constants. Here, the differential equation dy/dt = k(Ay - 1) and need to find which function among the given options is a solution to it. Let's check each option one by one:
Step:1 y = A^-1 + Ce^(Akt)
Differentiate this function with respect to t:
dy/dt = C * Ak * e^(Akt)
Now, plug this into the differential equation:
C * Ak * e^(Akt) = k(A(A^-1 + Ce^(Akt)) - 1)
This does not simplify to the original equation. So, option A is not a solution.
Step:2. y = A + Ce^(-kt)
Differentiate this function with respect to t:
dy/dt = -kC * e^(-kt)
Now, plug this into the differential equation:
-kC * e^(-kt) = k(A(A + Ce^(-kt)) - 1)
This does not simplify to the original equation either. So, option B is not a solution.
Step:3. y = A + Ce^(kt)
Differentiate this function with respect to t:
dy/dt = kC * e^(kt)
Now, plug this into the differential equation:
kC * e^(kt) = k(A(A + Ce^(kt)) - 1)
Divide both sides by k:
C * e^(kt) = A(A + Ce^(kt)) - 1
This equation does simplify to the original equation. So, option C is a solution to the given differential equation.
Thus, your answer is: The function y = A + Ce^(kt) is a solution to the differential equation dy/dt = k(Ay - 1) with A and k being positive constants.
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2.1 The Caledon Municipality provides Mr Thorn with a summary of the different types of electricity tariffs for the various electricity systems available in his district: System Prepaid Meter System 3-Part Flat Rate CALEDON MUNICIPALITY Electricity Tariffs Fixed Monthly Charge Fixed Monthly Charge (excluding VAT) R79 kWh Cost of Prepaid (R) Cost of 3-Part Flat Rate (R) Electricity Charge (per kWh) 124,5c 2.1.1 Copy and complete the table below showing the cost for each of the systems. 0 0 79 Electricity Charge (per kWh) 94,5c 50 100 150 200 250 2.1.2 Use the completed table to draw graphs showing the cost of the two systems. Draw the graphs on the same set of axes. 2.1.3 Use the graph to determine the electricity consumption for which the cost of the two systems are the same.
what is the probability that exactly one of the four scoops is vanilla flavored?
Answer:
probably about 10.24%
Step-by-step explanation: