twice a certain number is added to 10.if the result is minus 14, find the number

The function f has only one critical value on the open interval (0,10), and the answer is (a) one.

To find the critical values of the function f(x) on the open interval (0,10), we need to find the values of x where f'(x) is equal to zero or undefined.

First, we need to find the values of x where f'(x) is undefined. Since f'(x) contains a term of x in the denominator, it will be undefined at x = 0. However, since the interval we are interested in is (0,10), we can exclude this value.

Next, we need to find the values of x where f'(x) is equal to zero. We can set the numerator of f'(x) equal to zero and solve for x

cos(x²) = 1/5

Taking the inverse cosine of both sides, we get

x² = arccos(1/5)

x = ±√(arccos(1/5))

However, since we are only interested in the interval (0,10), we can discard the negative root. Using a calculator, we can find that

√(arccos(1/5)) ≈ 2.6779

Therefore, the correct option is (a) one

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Answer: No, it is not likely that 60% of Skyline College students say math is their favorite subject based on the given confidence interval of (0.6358, 0.7532).

The confidence interval tells us that we are 95% confident that the true proportion of Skyline College students who say math is their favorite subject lies between 0.6358 and 0.7532. This means that if we were to take many random samples from the population of Skyline College students and construct 95% confidence intervals for the proportion of students who say math is their favorite subject, 95% of those intervals would contain the true population proportion.

Since 0.60 is not within the interval (0.6358, 0.7532), it is unlikely that the true proportion of Skyline College students who say math is their favorite subject is 60%. However, we cannot make any definitive statements about the population proportion based on this one confidence interval alone.

Step-by-step explanation:

Step-by-step explanation:

Let A(x1,y1)=(-3,1), B(x2,y2)=(5,6)  be the points of a line segment.

Mid point = [tex]\sf{ \dfrac{x1+x2}{2} , \dfrac{y1+y2}{2} }[/tex]

Mid point = [tex]\sf{ \dfrac{-3+1}{2} , \dfrac{1+6}{2} }[/tex]

Mid point = [tex]\sf{ \dfrac{-2}{2} , \dfrac{7}{2} }[/tex]

according to the question the actual distance between Chattanooga and Nashville is 133 miles.

Distance is an object's total, aimless movement. Without regard to whether anything has a beginning or an end, distance can be defined as the amount of space that something has traversed. Distance is referred to be the breadth or magnitude of the gap between two locations. It should be highlighted that the distance between two points and the length travelled between the two are not the same thing. The total length of a path connecting two locations counts as the distance travelled. Distance is the distance in reality that a body travels. It also goes by the name "path length." For instance, the length of a path for the thing passing via point O and arriving at position P would be OP = 360 m.

given,

If 1 inch on the map represents 38 miles in reality, then 3.5 inches on the map would represent:

3.5 inches * 38 miles/inch = 133 miles

Therefore, according to the scale on the map, the actual distance between Chattanooga and Nashville is 133 miles.

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As a result, for the two schools, the measures of variability are:

Mountain View School:

Range = 4, Variance = 9.1733, Standard deviation = 3.029

Bay Side School:

Range = 10, Variance = 7.84, Standard deviation = 2.8.

The degree of variance or dispersion in a set of data values is measured by standard deviation. The degree to which the data values deviate or vary from the mean or average value of the data set is indicated by this statistical indicator.

We must ascertain the range, variance, and standard deviation for each dataset in order to determine the measures of variability for the two schools.

Mountain View School:

Range: The smallest class size is 5 and the largest is 9, so the range is 9-5 = 4.

Variance: To calculate the variance, we need to find the mean first.

Mean = (5+6+8+9+8+2+0+10+2+4+5+6+8)/15

= 5.6

Then, we can find the variance using the formula:

Variance = Σ(xi - μ)²/n

= [(5-5.6)² + (6-5.6)² + (8-5.6)² + (9-5.6)² + (8-5.6)² + (2-5.6)² + (0-5.6)² + (10-5.6)² + (2-5.6)² + (4-5.6)² + (5-5.6)² + (6-5.6)² + (8-5.6)²]/15

= 9.1733

Standard deviation = √(9.1733) = 3.029

Bay Side School:

Range: The smallest class size is 0 and the largest is 10, so the range is 10-0 = 10.

Variance: To calculate the variance, we need to find the mean first.

So,

Mean will be = (8+7+6+5+5+4+4+3+1+0+2+0+0+2+3+5)/15

= 3.6

Then, we can find the variance using the following formula:

Variance = Σ(xi - μ)²/n

= [(8-3.6)² + (7-3.6)² + (6-3.6)² + (5-3.6)² + (5-3.6)² + (4-3.6)² + (4-3.6)² + (3-3.6)² + (1-3.6)² + (0-3.6)² + (2-3.6)² + (0-3.6)² + (0-3.6)² + (2-3.6)² + (3-3.6)² + (5-3.6)²]/15

= 7.84

Standard deviation will be = √(7.84)

= 2.8

As a result, for the two schools, the measures of variability are:

Mountain View School:

Range = 4, Variance = 9.1733, Standard deviation = 3.029

Bay Side School:

Range = 10, Variance = 7.84, Standard deviation = 2.8

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The  explicit formula for nth term geometric sequence is aₙ = a x rⁿ⁻¹.

let a geometric series is of the form

a, a², a³, a⁴ a⁵, ....

where a₁ = a = first term and other terms are obtained by multiplying by

r.

Now, each term is r times of previous term.

So, to get the nth term we have to multiply (n-1) by r.

Thus, the explicit formula for nth term geometric sequence is

aₙ = a x rⁿ⁻¹

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Katie's claim can be represented by the equation: a² ¢= 4(1/2ab) + b²

Katie's claim can be represented by the equation:

Outer square area = Sum of areas of four triangles + Inner square area or mathematically, a² = 4(1/2ab) + b²

where "a" and "b" are the lengths of the legs of the right triangle and "a²" represents the area of the outer square, while "b²" represents the area of the inner square.

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Based on the information, we can infer that the most accurate method would be method 3 because it randomly selects the participants without any preference.

The most appropriate method for this survey would be method three (option D) because it will have a group of people who were chosen randomly. This means that people can have different ranges of age, gender, preferences, among others.

This is important because they will represent all the diversity of characteristics of the public, which will allow a study in this population to be more accurate.

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a) Given statement: skipped : I'm not sure what statement you're referring to, as there is no statement labeled "a" in  question.

Hence answer provided.

b) As the degrees of freedom increase, the t distribution curve does become more similar to the standard normal curve.

True. Because the t distribution resembles the normal distribution when the degrees of freedom are high.

c) The two mean non-pooled test is used for 2 independent populations under the assumption that the two populations have different standard deviations.

False - Because the non-pooled t-test can be used to compare the means of the two populations when the assumption of equal variances is true.

d) The standard error is the standard deviation of the sampling distribution and is calculated by dividing the sample standard deviation by the square root of the sample size.

False - Because the standard error, which is determined as the sample standard deviation divided by the square root of the sample size, is a measure of the variability of the sample mean.

a)  Given statement: skipped : I'm not sure what statement you're referring to, as there is no statement labeled "a" in  question.
b) Given statement : As the degrees of freedom increase, the t distribution curve does become more similar to the standard normal curve.

The given statement is true.

Because, When the degrees of freedom are large, the t distribution approaches the standard normal distribution.
c) Given statement: The two mean non-pooled test is used for 2 independent populations under the assumption that the two populations share the same standard deviation.

The given statement is true.

Because, When the assumption of equal variances is met, the non-pooled t-test can be used to compare the means of the two populations.
d)  Given statement: The standard error is not always equal to the sample standard deviation.  

The given statement false.

Because, The standard error is a measure of the variability of the sample mean, and it is calculated as the sample standard deviation divided by the square root of the sample size.

The sample standard deviation is a measure of the variability within the sample itself.

The standard error tends to be smaller than the sample standard deviation because it accounts for the effect of the sample size on the variability of the sample mean.

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Answer: 12.57

Step-by-step explanation:

the radius is 2 so you 2 times pi squared

The equation using the parent function y = √x that has a domain of 3≤x<∞ and a range of -2≤y<∞ is y = √(x - 3) - 2.

An equation is a mathematical statement that indicates the equality of two expressions. It typically contains variables, constants, and mathematical operations such as addition, subtraction, multiplication, and division. Equations are used to solve problems in various fields of mathematics, science, engineering, and economics. They can be written in various forms, such as standard form, slope-intercept form, point-slope form, and more.

Here,

To shift the parent function y = √x to the right by 3 units and down by 2 units, we use the transformation:

y = √(x - 3) - 2

This equation has a domain of 3 ≤ x < ∞, since we subtract 3 from x inside the square root function. The range is -2 ≤ y < ∞, since we subtract 2 from the square root function.

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Answer: y = -5

Step-by-step explanation:

We move the constants to one side to get y^3 = -125.

Then, we cube root both sides to get y = -5.

However, 2/7 is not equivalent to any fraction with denominator 6. Therefore, Maria's claim is incorrect.

A fraction is a way of representing a part of a whole or a ratio between two quantities. It consists of two numbers, the numerator (located above the fraction line) and the denominator (located below the fraction line), separated by a horizontal fraction bar. The numerator represents the number of parts of the whole or the ratio, while the denominator represents the total number of equal parts or the denominator of the ratio.

For example, the fraction 3/4 represents three out of four equal parts or three parts out of a total of four parts. It can also be interpreted as a ratio of three to four. Fractions can be simplified by dividing both the numerator and denominator by their greatest common factor. For instance, the fraction 6/8 can be simplified to 3/4 by dividing both the numerator and denominator by 2.

A counterexample to Maria's claim is the fraction 2/7.

To see this, note that 1/5 is equivalent to 14/70 and 1/7 is equivalent to 10/70. Therefore, any fraction between 1/5 and 1/7 can be expressed in the form n/70, where 10 < n < 14.

However, 2/7 is not equivalent to any fraction with denominator 6. Therefore, Maria's claim is incorrect.

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Andrew has $28, and Matthew has 5 times that amount, or $140.

The term "amount" typically refers to a quantity or sum of something. It can refer to a physical quantity of something, such as the amount of water in a glass, or an abstract quantity, such as the amount of time it takes to complete a task.

Let x be the amount of money that Andrew has.

Then, the amount of money that Matthew has is 5 times x, which is 5x.

Together, they have a total of $168, so we can write an equation:

x + 5x = 168

Simplifying, we get:

6x = 168

Dividing both sides by 6, we get:

x = 28

Therefore, Andrew has $28, and Matthew has 5 times that amount, or $140.

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Step-by-step explanation:

f(x) = - 2 (x+1)^2 + 8     is already in vertex form

quadratic form can be found by expanding it :

f(x) = -2 ( x^2 + 2x +1)  + 8

f(x0 = -2x^2 -4x -2 + 8  

f(x) =  - 2x^2 - 4x + 6     <=====quadrtaic form

Ben's house will be worth $490,523.96 in 9 years if the value continues to increase at a rate of 7% per year.

We can use the formula for compound interest, which is:

A = P × (1 + r)ⁿ

Where:

A = final amount

P = principal (starting value)

r = annual interest rate (expressed as a decimal)

n = number of compounding periods

In this case, the principal is $281,320, the annual interest rate is 7% (or 0.07 as a decimal), and the number of compounding periods is 9 years. Plugging in these values, we get:

A = $281,320 × (1 + 0.07)⁹

A = $281,320 × 1.743

A = $490,523.96

Therefore, Ben's house will be worth approximately $490,523.96 in 9 years if the value continues to increase at a rate of 7% per year.

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Answer:

Step-by-step explanation:

1. 7 x^2 - 9 y^2 = 343 is a hyperbola

2. x^2 + y^2 - 4 x + 6 y - 5 = 1 is a circle

3. 4 x^2 + 9 y^2 = 1 is a ellipse

4. x^2 - 6 y = 0 is a parabola

A conic section conic or a quadratic curve is described as  a curve obtained from a cone's surface intersecting a plane.

The three types of conic section are :

All conics are  written in terms of the following equation:

Ax2 + Bxy + Cy2 + Dx + Ey + F = 0.

In conclusion, a conic is the intersection of a plane and a right circular cone.

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#Complete question:

Match the following equations with the conic sections formed by them. 1. x 2 + y 2 - 4x + 6y - 5 = 0 hyperbola 2. x 2 - 6y = 0 circle 3. 4x 2 + 9y 2 = 1 ellipse 4. 7x 2 - 9y 2 = 343 parabola

The two questions should you ask are:

The given answers to the above questions, one can be able to know the ranges of values that the four numbers have, as well as their relative positions.

In the event that we know the smallest and biggest numbers, we can be ready to mark those points on the number line and after that put the other two numbers in between them agreeing to their relative positions.

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The value of one square in each sample is:

(a) 2

(b) 6

(c) 3

(d) 5

Let x represent the value one square. Thus, the value of one square in each sample can be determined as follow.

(a) 2x + 1 = 5        (Left side is equal to right side)

2x = 5 - 1

2x = 4

x = 4/2

x = 2

(b) 10 = x + 2 + 2

10 = x + 4

x = 10 - 4

x = 6

(c) 5 + 1 + x = 9

6 + x = 9

x = 9 - 6

x = 3

(d) 25 = 5x

x = 25/5

x = 5

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The bag contains 4.63 dollars.

To find :

Total amount of the coins bag contains.

Solution:

According to the given statement, a bag contains 50 coins.

Number of pennies = 16% of 50

                               = 0.16 × 50

                               = 8 pennies

Number of dimes  = 42% of 50

                            = 0.42 × 50

                             = 21 dimes

Number of nickels = 6 more than pennies

                              = 8 + 6

                             = 14 nickels

Number of quarters = Rest of the coins

                               = 50 - (8 + 21 + 14)

                               = 50 - 43

                              = 7 quarters

Since,

1 penny = 0.01 dollar

8 pennies = 0.01 × 8 = 0.08 dollar

1 dime = 0.10 dollar

21 dimes = 0.10 × 21 = 2.1 dollar

1 nickel = 0.05 dollar

14 nickel = 0.05 × 14 = 0.70 dollar

1 quarter = 0.25 dollar

7 quarter = 0.25 × 7 = 1.75 dollars

Total value of the coins in the bag = 0.08 + 2.10 + 0.70 + 1.75

                                                        = 4.63 dollars

Hence, The bag contains 4.63 dollars.

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the width of the previous image is 9.5mm.

     The widthh can be defined as the horizontal measurement or distance measured from side to side.

       In geometry, the shorter side of an object is frequently referred to as its "width". For instance, both of the given rectangles are identical rectangles, but one of them has been rotated to demonstrate that the shorter side of the rectangle is referred to as its width.

In the given problem,

         if the width of the previous image is x,

                            4x=38

                        ⇒x=9.5mm

So, the width of previous image is 9.5mm.

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The marginal revenue curves for the given demand curves are: MR = -0.5  Q + 12 In a monopoly market, the marginal revenue curve is always below the demand curve. This is because a monopolist can only increase their revenue by decreasing the price of their product, and therefore they must lower the price for all units sold, not just the last one.

For the first demand curve, P = -5Q + 25, the marginal revenue curve can be found by taking the derivative of the demand curve with respect to Q. This gives us:

MR = dP/d Q = -5

So the marginal revenue curve is a horizontal line at MR = -5. Adding the intercept of the demand curve at P = 25, we get:

MR = -5Q + 25

For the second demand curve, P = -0.5Q + 12, the marginal revenue curve can be found in the same way:

MR = dP/dQ = -0.5

So the marginal revenue curve is a horizontal line at MR = -0.5. Adding the intercept of the demand curve at P = 12, we get:

MR = -0.5Q + 12

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Answer:

x =  ± [tex]\frac{4}{3}[/tex]

Step-by-step explanation:

9x² − 16 = 0

9x² = 16

x² = [tex]\frac{16}{9}[/tex]

x = ± √[tex]\frac{16}{9}[/tex]

x =  ± [tex]\frac{4}{3}[/tex]

So, the answer is:  x = [tex]\frac{4}{3}[/tex] , - [tex]\frac{4}{3}[/tex]

A cone with a height of 9 in and a base diameter of 6 in has the volume 84.78 cubic inches.

The formula for the volume of a cone is:

V = (1/3)π[tex]r^{2}[/tex]h, where r is the radius of the base and h is the height.

In the question it is given height = 9 in and a base diameter = 6 in.

Radius = diameter/2

r = d/2 = 6/2 = 3 inches

Substituting the values in the formula:

V = (1/3)π[tex](3\ in)^2[/tex](9 in)

Simplifying the expression:

V ≈ 84.78 [tex]in^3[/tex]

Rounding to the nearest hundredth, we get:

V ≈ 84.78 [tex]in^3[/tex]

Therefore, the approximate volume of the cone is 84.78 cubic inches.

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A sample size of at least 1,521 Internet users would be necessary to estimate the proportion of interest (the proportion of Internet users who are willing to pay fees for website access) to within 2 percent in a 95 percent confidence interval.

To calculate the sample size required to estimate a proportion with a certain level of confidence and margin of error, we can use the following formula:

[tex]n = (Z^2 \times p \times (1 - p)) / E^2[/tex]

where:

n is the required sample size

Z is the Z-score for the desired level of confidence (95% confidence corresponds to a Z-score of 1.96)

p is the estimated proportion of interest (the proportion of Internet users who are willing to pay fees for website access)

E is the desired margin of error (2% in this case, expressed as a decimal)

We are given that out of a sample of 13,000 Internet users surveyed in 1995, 2,938 were definitely not willing to pay fees for website access. This means that the proportion of interest (p) is:

p = (13,000 - 2,938) / 13,000 = 0.774

Now we can plug in the values and solve for n:

[tex]n = (1.96^2 \times 0.774 \times (1 - 0.774)) / 0.02^2[/tex]

n ≈ 1,521

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The building is approximately 74.8 feet tall, and your head is approximately 117.7 feet away from the base of the building.

We can use trigonometry to solve this problem. Let's call the height of the building "h" and the distance from your head to the base of the building "d".

Using the tangent function;

tan(55°) = h/d

We know that h + 60 = d, so we can substitute h with d - 60:

tan(55°) = (d - 60)/d

Simplifying this equation, we get;

d = (h + 60)/tan(55°)

Substituting this value of d in first equation, we have;

tan(55°) = h/[(h + 60)/tan(55°)]

Simplifying this equation, we get;

h = 60 tan(55°)

Using a calculator, we find that h ≈ 74.8 feet.

Therefore, the building is approximately 74.8 feet tall.

To find the distance from your head to the base of the building, we can use the Pythagorean theorem;

d² = h² + 60²

Substituting h with 60 tan(55°), we get;

d² = (60 tan(55°)² + 60²

Using a calculator, we find that d ≈ 117.7 feet.

Therefore, your head is approximately 117.7 feet away from the base of the building.

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Answer:6

Step-by-step explanation:

18 pizzas were eaten at the party in total.

The term "total number" refers to the complete count or sum of a set of numbers or objects. It is the result of adding up all the individual numbers or objects in a set to get a final value that represents the entire set.

If each pizza was cut into 8 slices, then 2 and 1/2 pizzas is equivalent to 20 slices of pizza because:

2\frac{1}{2} \times 8 = 20

Since there were 7 groups of children, the total number of slices of pizza eaten at the party is:

20 slices/pizza x 7 groups = 140 slices

To convert this to the number of pizzas eaten, we divide the total number of slices by the number of slices per pizza:

140 slices ÷ 8 slices/pizza = 17.5 pizzas

Therefore, 17.5 pizzas were eaten at the party in total. However, since a pizza cannot be divided into fractions, we should round up to the nearest whole number, giving us a final answer of 18 pizzas.

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