t is commonly believed that the mean body temperature of a healthy adult is . you are not entirely convinced. you believe that it is not . you collected data using 40 healthy people and found that they had a mean body temperature of with a standard deviation of . use a 0.05 significance level to test the claim that the mean body temperature of a healthy adult is not . a) identify the null and alternative hypotheses?

The total recruiting expense is  $91,200 which includes Recruitment Cost, Interview Costs, Job Posting fee, Family travel cost and more

The total recruiting expense would be:

Recruitment Costs: $43,600

Interview Costs: $2,000 x 3

= $6,000

Job Posting fee: $1,000

1st year fee: 10% x $130,000

= $13,000

Real Estate Fee: 6% x $360,000

= $21,600

Shipping fee: $4,000

Family travel cost: $400 x 5

= $2,000

Total = $43,600 + $6,000 + $1,000 + $13,000 + $21,600 + $4,000 + $2,000

= $91,200

Hence, the total recruiting expense is  $91,200

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To find the limit of lim xy/√x^2 + y^2 (x,y) → (0,0), we can use polar coordinates. the limit is: lim xy/√(x^2 + y^2) as (x,y) → (0,0) = 0

Let x = rcosθ and y = rsinθ. Then, the limit becomes lim (rcosθ)(rsinθ)/√(rcosθ)^2 + (rsinθ)^2 as r approaches 0. Simplifying, we get lim rcosθsinθ/√r^2(cos^2θ + sin^2θ) as r approaches 0. Canceling out the r, we get lim cosθsinθ/√(cos^2θ + sin^2θ) as r approaches 0. Since cosθsinθ is less than or equal to 1, the limit must exist and equal 0.

Therefore, the limit of lim xy/√x^2 + y^2 (x,y) → (0,0) is 0.

To find the limit of lim xy/√(x^2 + y^2) as (x,y) → (0,0), you can use polar coordinates to transform the expression. Let x = rcosθ and y = rsinθ. Then, the given expression becomes:

(r*cosθ * r*sinθ) / √(r^2*cos^2θ + r^2*sin^2θ) = r^2*sinθ*cosθ / (r*√(cos^2θ + sin^2θ))

Simplifying the expression, we get:

r*sinθ*cosθ

Now, as (x,y) → (0,0), r → 0. The limit we are looking for is:

lim r*sinθ*cosθ as r → 0

Since sinθ and cosθ are bounded between -1 and 1, the product r*sinθ*cosθ will also approach 0 as r approaches 0.

Therefore, the limit is:

lim xy/√(x^2 + y^2) as (x,y) → (0,0) = 0

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The product QS is impossible because of the dimensions

From the question, we have the following parameters that can be used in our computation:

Matrices Q, R and S with the dimensions

Q = 2 by 2

R = 2 by 2

S = 2 by 3

The product QS is the product of matrices 2 by 2 and 2 by 3

This is not possible because the dimensions of the matrices Q and R do not match i.e. it is not possible to multiply matrices 2 by 2 and 2 by 3

Here, we have

S = 2 by 3

R = 2 by 2

This is also not possible because of the reason above

So, it has no order

Here, we have

[tex]Q = \left[\begin{array}{cc}2&-1\\4&3\end{array}\right][/tex]

[tex]R = \left[\begin{array}{cc}1&6\\-5&4\end{array}\right][/tex]

So, we have

[tex]QR = \left[\begin{array}{cc}2 * 1 + -1 * 5&2 * 6 - 1 * 4\\4 * 1 + 3 *-5&4 * 6 + 3 * 4\end{array}\right][/tex]

Evaluate

[tex]QR = \left[\begin{array}{cc}-3&8\\-11&36\end{array}\right][/tex]

Hence, the product QR is [tex]QR = \left[\begin{array}{cc}-3&8\\-11&36\end{array}\right][/tex]

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Answer:

48m^2 + 56m

Step-by-step explanation:

-8m(-6m - 7)

Use the distributive property. (-8m*-6m & -8m*-7)

-8m*-6m = 48m^2

-8m*-7 = 56m

48m^2 + 56m

The research method that involves collecting data repeatedly on the same person as he or she ages is longitudinal.

Longitudinal research involves studying the same group of individuals over an extended period of time, typically years or even decades. This type of research allows researchers to collect data on changes in behavior, attitudes, or health outcomes over time, and can provide valuable information on the effects of age, development, or life events on these outcomes. Longitudinal research can be especially useful in studying developmental processes, as it allows researchers to track changes in individuals as they grow and develop.

However, longitudinal studies can also be expensive and time-consuming, as researchers must track and collect data from the same group of individuals over many years, and there is a risk of attrition or drop-out over time.

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The mean of the data set is 33.7.

The median is 34.5

The mode is 34

The range is 33

Suppose the value 26 is added:

The mean decreases by 0.7

The median decreases by 0.5

The mode is 34

The range is 33

The data set is as follows:

{34, 35, 42, 18, 20, 51, 19, 47, 37, 34}

Let's arrange it in ascending order.

{18, 19, 20, 34, 34, 35, 37, 42, 47, 51 }

The mean, or arithmetic mean, is the average value of a set of numbers. Therefore, let's find the mean.

mean = 18 + 19 + 20 + 34 + 34 + 35 + 37 + 42 + 47 + 51 / 10

mean = 337 / 10

mean = 33.7

The median is the middle number. Therefore,

median = 34 + 35 / 2

median = 34.5

Let's find the mode. The mode is the number that appears most.

mode = 34

The range is the difference between the highest number and the smallest number.

range = 51 - 18 = 33

Suppose the value 26 is added to the data set.

mean when 26 is added = 337 + 26 / 11 = 33

The mean decreases by 0.7

The median decreases by 0.5

The mode is 34

The range is 33

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Answer:

We can use trigonometry to solve this problem. Let's call the total distance traveled on the ski lift "d". We know that the angle of elevation from the bottom of the ski lift to the top of the mountain is 62°, which means the angle of depression from the top of the mountain to the bottom of the ski lift is also 62°.

Using trigonometry, we can write:

sin(62°) = 1,760 / d

To solve for "d", we can isolate it by multiplying both sides by "d" and then dividing both sides by sin(62°):

d = 1,760 / sin(62°)

Using a calculator, we get:

d ≈ 1,966.6 feet

Therefore, the total distance traveled on the ski lift from the bottom to the top of the mountain is approximately 1,966.6 feet.

Step-by-step explanation:

To find f(x + h), we substitute x + h for x in the function f(x):

f(x + h) = (x + h)^2 + 2(x + h) + 1

Now we simplify by expanding the square:

f(x + h) = x^2 + 2hx + h^2 + 2x + 2h + 1

We can combine like terms to simplify this expression:

f(x + h) = x^2 + (2h + 2)x + (h^2 + 2h + 1)

Therefore, f(x + h) = x^2 + (2h + 2)x + (h^2 + 2h + 1).

Answer:

[tex]f(x+h) = x^2 + 2xh + h^2 + 2x+2h + 1[/tex]

Step-by-step explanation:

In this question, we have to plug (x + h) into the given function and simplify.

[tex]f(x) = x^2 + 2x + 1[/tex]

↓ replacing all instances of x with (x + h)

[tex]f(x+h) = (x+h)^2 + 2(x+h) + 1[/tex]

↓ expanding the quadratic term (x + h)²

[tex]f(x+h) = (x^2 + 2xh + h^2) + 2(x+h) + 1[/tex]

↓ applying the distributive property ... [tex]2(x+h) = 2x + 2h[/tex]

[tex]\boxed{f(x+h) = x^2 + 2xh + h^2 + 2x+2h + 1}[/tex]

No further simplification can be done.

The steps to graph the image of the figure after a dilation with a scale factor of 3 centered at (2, −7) are given below.

To graph the image of the figure after a dilation with a scale factor of 3 centered at (2, −7), we need to apply the following steps:

Plot the original figure on a coordinate plane.

Draw a point at the center of dilation (2, −7).

Draw lines connecting the vertices of the original figure to the center of dilation.

Extend each line from the center of dilation by a factor of 3.

Plot the new vertices where the extended lines intersect.

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Answer:

R59.96

Step-by-step explanation:

250 x 4 = 1000

14.99 x 4 = 59.96

1. We can use the expression in option D

2. ║YC║ IS 3

3. ║BX║is 1.2

Similar triangles have several important properties. One of the key properties is that their corresponding angles are congruent, which means they have the same measures.

When triangles are similar, their corresponding sides are proportional. This means that if you take the ratio of the lengths of any two corresponding sides.

We know that;

║BC║ / ║YC║ = ║AB║ /  ║AX║

15/  ║YC║ = 10/2

║YC║ = 15 * 2/10

= 3

Also;

║BC║ /  ║YC║ =  ║AB║ /  ║BX║

10/2 = 6 / ║BX║

║BX║ = 2 * 6/10

= 1.2

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The inequality that represents the number of animals at the shelter for expenses to be at least $1170 a week is x ≥ 70.

To solve this problem, we need to start by setting up an equation that represents the total weekly expenses of the animal shelter. Let's call the number of animals in the shelter "x".

The fixed expenses are $750, and each animal costs an additional $6 per week, so the total weekly expenses can be represented by the equation:

Total Weekly Expenses = $750 + $6x

We also know that during the summer months, the total weekly expenses are at least $1170. So, we can set up an inequality to represent this:

$750 + $6x ≥ $1170

To solve for x, we can start by subtracting $750 from both sides of the inequality:

$6x ≥ $420

Then, we can divide both sides by $6 to isolate x:

x ≥ 70

This means that there must be at least 70 animals in the shelter for the total weekly expenses to be at least $1170.

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The center and vertices if the ellipse is,

Center = (0, 0)

Vertex = (±7, 0)

We have to given that;

Equation of Ellipse is,

⇒ x²/49 + y² / 4 = 1

Since, We know that;

For equation of ellipse,

x²/a² + y²/b² = 1

Center = (0, 0)

Vertex = (±a, 0); for a > 0

Here, Equation of Ellipse is,

⇒ x²/49 + y² / 4 = 1

Here, a² = 49

a = ± 7

And, b² = 4

b = ±2

Hence, a > b

So, We get;

Center = (0, 0)

Vertex = (±a, 0); for a > 0

Vertex = (±7, 0)

Thus, The center and vertices if the ellipse is,

Center = (0, 0)

Vertex = (±7, 0)

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The equation of the circle, obtained by applying the completing the square method to the specified equation indicates that the center and radius of the circle are;

Center (0, 6) and radius 7.5

The general form of the equation of a circle is; (x - h)² + (y - k)² = r², where;

(h, k) = The coordinates of the center of the circle

r = The measure of the length of the radius

The possible equation obtained from a similar question on the internet can be presented as follows;

x² + y² - 12·y - 20.25 = 0

The above equation can be evaluated using the completing the square method and excluding the x² term as follows;

y² - 12·y - 20.25 = 0

y² - 12·y = 20.25

y² - 12·y + (-12/2)² = 20.25 + (-12/2)²

y² - 12·y + (-6)² = 20.25 + (-6)² = 56.25

(y - 6)² = 56.25

Therefore;

y - 6 = √(56.25) = ±7.5

The possible equation of the circle obtained by plugging in the x² term therefore is; (x - 0)² + (y - 6)² = 7.5²

The center of the circle is therefore;

(h, k) = (0, 6)

The radius of the circle, r = 7.5

The possible correction is therefore, option (a), where the 5 is a typing error

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The meteorologist needs to analyze approximately 164 air samples to be 80% certain that the error of estimate does not exceed 0.2 ppm.

A meteorologist aiming to estimate the nitrogen dioxide content in the air needs to consider the standard deviation and desired level of certainty. In this case, the known standard deviation is 2 ppm, and the desired certainty is 80%, with an error of estimate not exceeding 0.2 ppm.
To calculate the number of air samples needed, the meteorologist can use the formula:
n = (Z * σ / E)^2
Here, n represents the required sample size, Z is the z-score corresponding to the desired certainty level (80%), σ is the standard deviation (2 ppm), and E is the margin of error (0.2 ppm).
For 80% certainty, the z-score is approximately 1.28. Plugging the values into the formula, we get:
n = (1.28 * 2 / 0.2)^2 = (12.8)^2 ≈ 164
Thus, the meteorologist needs to analyze approximately 164 air samples to be 80% certain that the error of estimate does not exceed 0.2 ppm.

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Answer:

The formula for calculating the area of a regular polygon is A = (n/2) * L * R, where n is the number of sides in the polygon, L is the length of one side of the polygon, and R is the radius of an inscribed circle.

Step-by-step explanation:

The formula for calculating the area of a regular polygon is A = (n/2) * L * R, where n is the number of sides in the polygon, L is the length of one side of the polygon, and R is the radius of an inscribed circle.

Hello !

Minimum = 6 (the smallest value)

First quartile = 8 (25% of 7 = 1,75    => 2nd value)

Median = 15 (the value in the middle)

Third quartil = 23 (75% of 7 = 5,25    => 6th value)

Maximum = 31 (the greatest value)

It's C

Answer:

C. The 3.rd Answer :)

Main Answer: A range of values, that with a certain degree of probability contain the population parameter, is known as a "confidence interval estimate."

Supporting Question and Answer:

What is the purpose of a confidence interval estimate in statistics?

The purpose of a confidence interval estimate in statistics is to provide a range of values that, with a certain degree of probability, contains the population parameter of interest. This range allows for a measure of uncertainty and provides a level of confidence in the estimation process.

Body of the Solution: The correct answer is "confidence interval estimate."

A confidence interval estimate is a range of values that, with a certain degree of probability (often represented by a confidence level), is believed to contain the population parameter of interest. It is used in statistics to provide an estimate of an unknown population parameter based on sample data. The confidence interval provides a range rather than a single point estimate, allowing for a measure of uncertainty in the estimation process.

Final Answer: The correct answer is "confidence interval estimate."

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A range of values, that with a certain degree of probability contain the population parameter, is known as a "confidence interval estimate."

The purpose of a confidence interval estimate in statistics is to provide a range of values that, with a certain degree of probability, contains the population parameter of interest. This range allows for a measure of uncertainty and provides a level of confidence in the estimation process.

The correct answer is "confidence interval estimate."

A confidence interval estimate is a range of values that, with a certain degree of probability (often represented by a confidence level), is believed to contain the population parameter of interest. It is used in statistics to provide an estimate of an unknown population parameter based on sample data. The confidence interval provides a range rather than a single point estimate, allowing for a measure of uncertainty in the estimation process.

The correct answer is "confidence interval estimate."

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There are no points where the graph of f(x) = x² intersects the line y = x - 2, and the equation has no real solutions.

To solve x² - 2 = 2x using the graph of the function f(x) = x² we can start by rewriting the equation as x^2 - 2x - 2 = 0.

Then, we can graph the function f(x) = x² and find the points where the graph intersects the line y = x - 2.

These points correspond to the solutions of the equation x² - 2x - 2 = 0.

We can then use the quadratic formula to solve for x:

x = (-(-1) ± √((-1)² - 4(1)(2))) / (2(1))

x = (1 ± √(-7)) / 2

Since the discriminant is negative, there are no real solutions to the equation x² - 2 = 2x.

Therefore, there are no points where the graph of f(x) = x² intersects the line y = x - 2, and the equation has no real solutions.

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c) the volume of the solid is 243/28 cubic units.

a. To find the area of R, we need to determine the points of intersection of the graphs y = sqrt(x) and y = x/3 in the first quadrant.

Setting sqrt(x) = x/3, we get x = 9/4. So, the region R is bounded by x = 0, x = 9/4, y = sqrt(x), and y = x/3.

Thus, the area of R is given by the integral:

∫[0,9/4] [sqrt(x) - x/3] dx

= [2/3 x^(3/2) - 1/6 x^2] evaluated from 0 to 9/4

= (2/3)(9/2)^(3/2) - (1/6)(9/4)

= 3√2 - 3/8

Therefore, the area of R is 3√2 - 3/8 square units.

b. To find the volume of the solid generated when R is rotated about the vertical line x = -1, we use the disk method. Each disk has a radius equal to the distance from x = -1 to the curve, and a thickness of dx.

The distance from x = -1 to y = sqrt(x) is 1 + sqrt(x), and the distance from x = -1 to y = x/3 is 1 + 3y. So, the volume of the solid is given by the integral:

∫[0,9/4] π[(1 + sqrt(x))^2 - (1 + 3x)^2] dx

= π ∫[0,9/4] (2sqrt(x) - 8x - 8sqrt(x)x) dx

= π [(4/3)x^(3/2) - 4x^2 - 4/3 x^(5/2)] evaluated from 0 to 9/4

= (16/3)π - (81/2)π/5 + (64/15)π

= (152π/15) - (81π/10)

= 19π/30

Therefore, the volume of the solid generated when R is rotated about the vertical line x = -1 is 19π/30 cubic units.

c. Since the cross sections perpendicular to the y-axis are squares, the area of each cross section is equal to the square of the corresponding value of y. So, the volume of the solid can be found by integrating the area of each cross section with respect to y.

The height of each cross section is given by the difference between the y-coordinates of the curves y = sqrt(x) and y = x/3 at a given value of y.

Thus, the volume of the solid is given by the integral:

∫[0,3] y^2 [sqrt(y) - y/3]^2 dy

= ∫[0,3] y^(5/2) - 2y^(7/2)/3 + y^3/9 dy

= [2/7 y^(7/2) - 4/27 y^(9/2) + 1/12 y^4] evaluated from 0 to 3

= (54/7) - (324/27) + (81/4)

= 54/7 - 36/1 + 81/4

= 243/28

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Answer:

---------------------------

The probability of flipping a coin and having it land "heads" up is 1/2.

Since each coin flip is independent, the probability of getting three heads in a row is the product of the individual probabilities.

Therefore, the probability of flipping a coin three times and having them all land "heads" up is:

Answer:  How many hours did Jacob work in his second week if he earned $117?​

Step-by-step explanation:

We can start by setting up a proportion to relate the number of hours worked to the amount earned:

hours worked / amount earned = constant of proportionality

Let's call the constant of proportionality "k". Then we have:

15 / 146.26 = k

Solving for k, we get:

k = 9.75

Now we can use this value of k to find the number of hours Jacob worked in his second week:

117 / 9.75 = 12

Therefore, Jacob worked 12 hours in his second week if he earned $117.

{Hope This Helped! :)}

We need to use some basic algebraic equations. Let's assume that the initial payment made by Frankie was x, and the total amount he has to pay for the computer is y. Also, let's assume that Frankie will make n monthly payments.

Now, we know that Frankie has already paid x, and he has to pay y-x more. Since he will pay this amount in n monthly installments, we can represent the monthly installment as (y-x)/n.

So, the equation that represents the relationship between n and y can be written as:

y = x + n*(y-x)/n

Simplifying this equation, we get:

y = x + y-x

y = y

This means that the equation is true for any value of n and y, as long as x is a valid initial payment amount. Therefore, the equation that represents the relationship between n and y is:

y = x + n*(y-x)/n

The equation we derived above is a simple but important concept in mathematics and finance. It shows us that we can calculate the total amount we need to pay for something by multiplying the monthly installment by the number of payments and adding the initial payment to it. This concept is used in many financial transactions, such as car loans, mortgages, and credit card payments.

Moreover, this equation also helps us to plan our finances and manage our budget effectively. We can use it to calculate how much we need to save every month to reach our financial goals, or to compare different payment options and choose the one that suits us best.

In conclusion, the equation that represents the relationship between the number of monthly payments and the total amount paid is an essential tool for anyone who wants to make wise financial decisions. By understanding this equation, we can save money, avoid debt, and achieve our financial goals more easily.

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The area of the banner is 24 square feet.

We have,

Since the spirit spanner is in the form of a triangle.

We can use the area of a triangle to calculate the area of the banner.

The area of a triangle is given by the formula:

Area = (1/2) x base x height

Substituting the given values.

Area = (1/2) x 8 feet x 6 feet

Area = 24 square feet

Therefore,

The area of the banner is 24 square feet.

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The  sculpture's dimensions or the size of the mosaic tiles, it's not possible to determine the exact number of tiles needed to cover the sculpture.

The number of tiles required depends on factors such as the size of the sculpture, the desired level of detail, and the size of the individual mosaic tiles.

To calculate the minimum number of tiles needed, we would need to know the surface area of the sculpture and the surface area covered by each tile.

The surface area of the sculpture could be approximated by breaking it down into smaller geometric shapes and summing up their individual areas. Then, by dividing the sculpture's surface area by the area covered by each tile, we could estimate the minimum number of tiles required.

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The answer is 1,184 Revolutions (option C).

First, we need to convert the diameter of the wheel to meters.

18 inches = 18/39.3701 meters ≈ 0.4572 meters

The circumference of the wheel is:

π × diameter = 3.14 × 0.4572 ≈ 1.436 meters

To travel 1,700 meters, the wheel needs to make:

1700/1.436 ≈ 1184 revolutions

Therefore, the answer is 1,184 revolutions (option C).

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The percentage decrease in flight time between Air New Zealand's first flight from Auckland to Sydney, which took nine hours, and the current flight time of about three hours can be calculated. The percentage decrease represents the reduction in flight time as a proportion of the original flight time.

   To calculate the percentage decrease, we first need to find the difference in flight time between the first flight and the current flight. The difference is obtained by subtracting the current flight time from the original flight time: 9 hours - 3 hours = 6 hours.

Next, we calculate the percentage decrease by dividing the difference in flight time by the original flight time and multiplying by 100:

Percentage decrease = (6 hours / 9 hours) * 100 = 66.67%

Therefore, there has been a 66.67% decrease in flight time between Air New Zealand's first flight from Auckland to Sydney and the current flight time. This represents a significant reduction in the time it takes to complete the journey.

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