How do you graph a circle x^2 + y^2=25 and the line is given y=2

Answers

Answer 1
[tex]\bf \textit{equation of a circle}\\\\ (x-{{ h}})^2+(y-{{ k}})^2={{ r}}^2 \qquad \begin{array}{lllll} center\ (&{{ h}},&{{ k}})\qquad radius=&{{ r}} \end{array}\\\\ -------------------------------\\\\ x^2+y^2=25\implies (x-0)^2+(y-0)^2=5^2[/tex]

so notice above, the circle is centered at h,k or 0,0, the origin, and has a ratio of 5.

and y = 2, is just a horizontal line, check the picture below.
How Do You Graph A Circle X^2 + Y^2=25 And The Line Is Given Y=2

Related Questions

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 12.7 years, and standard deviation of 2.5 years. if you randomly purchase one item, what is the probability it will last longer than 8 years?

Answers

First let us calculate for the z score using the formula:

z = (x – u) / s

where x = 8, u is the mean = 12.7 years, s is the standard deviation

 

z = (8 – 12.7) / 2.5

z = -1.88

 

From the standard probability tables, the p value at z = -1.88 is:

P = 0.0301 = 3.01%

Farmer Dave builds a crate to hold vegetables. the volume of the crate is 48 cubic feet. the base area of the crate is 16 square feet. what is the height of the crate

Answers

There is missing data here.

Volume of crate = length x width x height.

We know the volume and base.

To find the height, we need the length.

Answer:

the answer is 3

Step-by-step explanation:

just got it right on iready

At a sporting goods store, the price of a bicycle is $650. During a sale, this price is marked down 45%.

What is the sale price of the bicycle

Answers

650 x .45 = 292.5

650 - 292.5 = $357.5

Answer:

the answer is 357.50

Step-by-step explanation:


What is 888 rounded to the nearest ten?

Answers

 888 rounded to the nearest ten = 890

hope it helps
the correct answer is 890
 plz leave a like and put me as brainliest

Over the last 50 years, the average temperature has increas ed by 2.5 degrees worldwide (I made this up). What is the rate of change in worldwide temperatures per year?

Answers

In this question, you are given the temperate change (increase 2.5 degrees) and the duration (50 years). You are asked the rate of change which has a unit of temperature/year. Then to find it, the calculation would be:

rate of change= temperature change / duration
rate of change= 2.5 degrees / 50 years = 0.05 degrees / year

Use this information to find the value of b.


c = 25

s = 9


b = 4c - s2

Answers

Hello There!

Write out the formula again:
b = 4c - s².
Substitute your numbers in:
b = 4(25) - (9)²
Simplify:
4 x 25 = 100
9² = 81
b = 100 - 81
Solve:
100 - 81 = 19
b = 19.

Hope This Helps You!
Good Luck :) 

- Hannah ❤
Final answer:

To find the value of b in the equation 25s = 9b = 4c - s^2, we can substitute the given values and solve using the quadratic equation.

Explanation:

To find the value of b, we can use the given information and substitute the values of a, b, and c into the quadratic equation.

The equation is: c = 25s = 9b = 4c - s^2

Substituting the values:

25s = 9b = 4c - s^2

25s = 9b = 4c - s^2

Now we can solve for b:

9b = 4c - s^2

9b = 4(-0.0211) - (9)^2

9b = -0.0844 - 81

9b = -81.0844

b = -81.0844/9

b = -9.01

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I don't know how to solve this

Answers

The goal is to get x by itself. So you have 3/4x=1464. First you would multiply by 4 on both sides to get rid of the fraction. 1464x4 is 5,856
So what you're left with is 3x=5,856, so you divide on both sides by 3 to get x by itself and end up with the answer x=1952.
Another way to do this is if you understand how fractions work, 3/4 is equivalent to .75 so think of it as .75x=1464 and divide by .75 on both sides to get 1952. Either way works and either way x=1,952

A useful rule of thumb called the "rule of 70" states that if something grows at a constant rate of z percent per year, it doubles in size approximately every __________ years.
a. z/70
b. 70/z
c. 70 - z
d. 70 × (z/100)

Answers

The answer is b. (70/z). If I put $100 into a savings account and the annual growth rate is 10%, the 70/10%= 7 years that the initial $100 would take to double.

Sean Matthews is a waiter at the Duluxe Lounge. In his first weekly pay in March, he earned $300.00 for the 40 hours he worked. In addition, he reports his tips for February to his employer ($500.00), and the employer withholds the appropriate taxes for the tips from this first pay in March.

Answers

Final answer:

Sean Matthews' weekly earnings are subject to payroll taxes, including his tips. The deductions for social security and medicare are split between him and his employer. Understanding how these deductions work can enable him to maximize his total earnings.

Explanation:

The subject of the question pertains to Sean Matthews' earnings at the Duluxe Lounge, which involves payroll taxes on his wages and tips. From his regular wages of $300.00 for 40 hours, "payroll taxes" of 6.2% for Social Security and 1.45% for Medicare are deducted. The same deductions also apply to his reported tips of $500.00. These deductions are shared between Sean and his employer, though, it's possible that the employer's share might effectively be passed onto Sean in the form of lower wages.

Learning and understanding these financial procedures can significantly help individuals like Sean to maximise their total earnings.

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$736 will be his Net take home.

Net pay is the money you have left when your paycheck makes its way to you and all of the required taxes are taken out. To find Sean's net pay, both his earned wages and the reported tips will be considered for tax deductions.

Calculate total earnings for the week:
Wages = $300.00.
Total earnings = Wages + Tips = $300.00 + $500.00 = $800.00.

Assume a tax rate (federal, state, and other taxes) of 2%  
Tax deductions = $800.00 x 2% = $16.00.

Calculate net pay:
Net pay = Total earnings - Tax deductions = $800.00 - $16.00 = $736.00.

complete question:

Sean Matthews is a waiter at the Deluxe Lounge. In his first weekly pay in March, he earned $300.00 for the 40 hours he worked. In addition, he reports his tips for February to his employer ($500.00), and the employer withholds the appropriate taxes for the tips from this first pay in March.Calculate his net take-home pay assuming the employer withheld federal income tax (wage-bracket, married, 2 allowances), social security taxes, and state income tax (2%).

round to the nearest whole number 5.98

Answers

5.98 rounded to the nearest whole number is 6
To round 5.98, you would look to the tenths place. There's a 9 in the tenths pace so that tells you to round up to 6.

Ella has three flower beds each has four rows of flowers in it if there are 24 flowers in each row how many flowers are there in all

Answers

There are 288 flowers in all
114. each flower bed has for 4 rows and there are 24 in each row. 24 ×4 = 48. there are 3 flower beds so 48×3=114

What is the sum of the angle measures of a 32-gon? A. 5400 B. 5760 C. 6120 D. 5580

Answers

[tex]\bf \textit{sum of all interior angles}\\\\ s=180(n-2)\quad \begin{cases} n=\textit{number of sides}\\ ----------\\ n=32 \end{cases}\implies s=180(32-2)[/tex]

Answer:

The sum of measure of angle is 5400

Step-by-step explanation:

Given a 32-gon.

we have to find the sum of the angle measures of a 32-gon

In geometry, 32-gon is a thirty-two-sided polygon i.e polygon of 32 sides

The sum of measure of interior angle of polygon is calculated by the formula

[tex]s=(n-2)180^{\circ}[/tex]

where n is number of sides

[tex]s=(32-2)180=30\times 180=5400[/tex]

Hence, option A is correct.

A rectangle has a width of 44 centimeters and a perimeter of 180 centimeters what is the rectangle length

Answers

If the width of a rectangle is 44 cm, multiply that by 2 for the other side and you have 88. 180 - 88 = 92, so divide that by 2 for each side and the length is 46 cm.

dom wants to buy 5 baseballs he has $20 what is the most each baseball can cost?

Answers

Each baseball can cost $4.00. Hope this helps! :D

$20 divides by what is $5? 5x4 = 20 so the most a baseball can cost is $4

How do you choose the level of accuracy given the limitations of a situation?

Answers

Accuracy is how close a measured value is to the actual (true) value.

A cashier has 30 bills, all of which are $10 or $20 bills. The total value of the money is $460. How many of each type of bill does the cashier have?

Answers

the cashier has 16 $10 bills and 14 $20 bills
16×20=320
14×10=140
320+140=460

Answer:

There are 14 $10 bills and 16 $20 bills.

Step-by-step explanation:

Let

x = number of $10 bills

y = number of $20 bills

The sum of the value of x and y is $460.

10 x + 20 y = 460   [1]

The sum of x and y is equal to the total number of bills.

x + y = 30

y = 30 - x   [2]

We replace [2] in [1],

10 x + 20 (30 - x) = 460

10 x + 600 - 20 x = 460

-10 x = -140

x = 14

We can get y if we replace this value of x in [2].

y = 30 - 14 = 16

A line passes through the points (2, –2) and (–6, 2). The point (a, –4) is also on the line. What is the value of a?

Answers

Answer:

The value of a=6[/tex]

Step-by-step explanation:

step 1:-

col linearity of three points :-

We know that slopes of two parallel lines are equal.If two lines having the same slope pass through a common point ,then two lines will coincide . Hence ,If A,B,C are three points in the X Y- plane, then they will lie on a line,

that is three points are col linear if and only if Slope of AB= slope of BC

step 2:-

Since the given three points are col-linear, we have

Slope of AB= slope of BC

given points are A(2,-2) ,B(-6,2) and C(a,-4)

Step 3 :-

Slope of AB= slope of BC

[tex]\frac{2-(-2)}{-6-2} =\frac{-4-2}{a+6}[/tex]

[tex]\frac{-1}{2} =\frac{-6}{a+6}

 by cross multiplication

we get \\a+6=12\\

Step 4:-

The value of a=6[/tex]

Use distributive property

Question 1. 2f+10

Question 2. 20+24g

Question 3. 32b - 20


simplify the expression

Question 4. 24h + 3d - 10hn+ 8d

Question 5. 12s + 4 + 4s - 2

Answers

1. B
2. A
3. C
4. A
5. C

Hope this still helps! :)

The solutions for the disruptive property are,

2f+10 = 2 (f + 5)

20+24g = 4(5 + 6g)

32b - 20 = 8(4b - 5)

The solution to the expressions is,

E = 24h -10hn +11d

E = 16s + 2

What is an expression?

The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.

The solution of the equations by using distributive property,

2f+10 = 2 (f + 5)

20+24g = 4(5 + 6g)

32b - 20 = 8(4b - 5)

Simplify the expression

E = 24h + 3d - 10hn+ 8d

E = 24h -10hn +11d

The solution of the second expression is,

E = 12s + 4 + 4s - 2

E = 16s + 2

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LMN Office Company sells 20 printer cartridges for $240. XYZ Supplies has a box of printer cartridges for $150. The box contains 12 cartridges.
Which company has the least expensive cartridge? choose one of the following

LMN Office Company?
XYZ Supplies?
They are the same?
Not enough information?

Answers

The Answer is LMN Office Company
Answer:

The company which  has the least expensive cartridge is:

                       LMN office company.

Step-by-step explanation:

LMN Office Company sells 20 printer cartridges for $240.

This means that the cost of 1 printer cartridge is:  $ 240/20=$ 12

Also, . XYZ Supplies has a box of printer cartridges for $150.

The box contains 12 cartridges.

This means that the cost of 12 cartridge is: $ 150

Hence, cost of 1 printer cartridge is: $ 150/12=$ 12.5

Hence, the company which has the least expensive cartridge is:

            LMN Office Company.

( Since, 12 < 12.5  )

A total of $5000 was invested in two accounts. One pays 5% annual interest, and the second pays 7% annual interest. If the first-year interest is $325, how much was invested in each account?

Answers

Sent a picture of the solution to the problem (s). We end up with 2 equation. .05x +.07y=325 which show the total interest of both account , and x+y=5000. Used system of equations.

An apartment building has the following distribution of apartments: 1st floor 1 bed room 3, two bedroom 1, 3 bedroom 1, 2nd floor 1 bedroom 2, 2 bedroom 2, 3 bedroom 2, 3rd floor 1 bedroom, 2 bedroom 4, 3 bedroom 1. If an apartment is selected at random, what is the probability that it is on the 2nd floor or has 2 bedrooms

Answers

Final answer:

The probability that an apartment is on the 2nd floor or has 2 bedrooms is 0.7727 or 77.27%.

Explanation:

To find the probability that an apartment is on the 2nd floor or has 2 bedrooms, we need to determine the total number of apartments that satisfy either of the conditions.

On the 2nd floor, there are 2 apartments with 1 bedroom, 2 apartments with 2 bedrooms, and 2 apartments with 3 bedrooms. This gives us a total of 2 + 2 + 2 = 6 apartments on the 2nd floor.

Out of the total distribution of apartments, there are 3 apartments with 1 bedroom, 4 apartments with 2 bedrooms, and 4 apartments with 3 bedrooms. This gives us a total of 3 + 4 + 4 = 11 apartments with 2 bedrooms.

The probability of an apartment being on the 2nd floor or having 2 bedrooms is given by:

Probability = (Number of apartments on the 2nd floor + Number of apartments with 2 bedrooms) / Total number of apartments

Probability = (6 + 11) / (6 + 1 + 1 + 2 + 2 + 2 + 1 + 2 + 4 + 1) = 17 / 22 = 0.7727 or 77.27%

Each of 5 birdwatchers reported seeing 15 roseate spoonbills in a day. If they each reported seeing the same nunber of roseate spoonbills over 14 days, how many would be reported?

Answers

Each of the 5 saw 15 birds a day, so they saw 75 each day for 14 days. 75 times 14 is 1,050. They saw in total, 1,050 birds.

Find the unit rate for 521 miles in 14 hours

Answers

That unit rate is (521 miles) / (14 hours), or 37.21 mph (rounded off).  I divided 521 by 14 on my calculator to obtain this result.

The unit rate for 521 miles in 14 hours is 37.2 miles per hour

Given:

Total distance travelled = 521 miles

Total time taken = 14 hours

Unit rate = Total distance travelled ÷ Total time taken

= 521 miles ÷ 14 hours

= 37.214285714285

Approximately, 37.2 miles per hour

Therefore, unit rate for 521 miles in 14 hours is 37.2 miles per hour

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Meg is printing a term paper for class at the rate shown in the table below. If the term paper is 60 pages long, how many total minutes will it take to print out? Assume that the printer prints the pages at a constant rate.

Answers

Pretty sure the answer is 24 because 60 pages divided by 15 pages (6 mins each) = 4

So, 4 times 6 (since we have to print 15pages 4 times) = 24minuets
You may use the data from any one column of the table to calculate the approx. printing rate.  Suppose we choose to use the data (4 minutes, 10 pages).  Then the printing rate is 10/4   pages per minute, or (5/2) pages per minute, or 2.5 pages per minute.

How long would 60 pages take to print?  We want to eliminate the unit "pages" in favor of "min."  So, multiply "60 pages" by (2 min) / (5 pages).  "pages" will cancel:

60 pages       2 min
------------- * -------------- = 24 minutes  (answer)
        1           5 pages

what is the value of x in the proportion below ?

180 Kilometers / 3 hours = 540 Kilometers / X

Answers

Answer: 9 hours

Step-by-step explanation:

Given proportion : [tex]\frac{\text{180 Kilometers}}{\text{3 hours}}=\frac{\text{540 Kilometers }}{x}[/tex]

To find the value of x , we need to multiply 3x hours and divide 180 Kilometers on both the sides, we get

[tex]\text{x}=3\times\frac{540}{180}\text{hours}\\\\\Rightarrow\ x=3\times3\\\\\Rightarrow\ x=9\text{ hours} [/tex]

Hence, the value of x = 9 hours.

Over the course of a year,a tractor-trailer commutes 160,000 miles across America.Assuming a trucker changes his tires every 40,000 miles,and that he starts with a brand new set of tires,how many sets of tires will he use in a year?

Answers

160,000 - 40,000= 120,000/4 = 3 sets of new tires in the first year and 4 every consecutive year.
Final answer:

Given that a trucker changes his tires every 40,000 miles, if he drives 160,000 miles in a year, he will use a total of 5 sets of tires.

Explanation:

The question is asking us to find out how many sets of tires a trucker will use when he drives 160,000 miles in a year, given that he changes his tires every 40,000 miles. To find out, we need to do some simple division.

First, we need to take the total distance traveled, which is 160,000 miles, and divide it by the distance the trucker can travel on a set of tires, which is 40,000 miles. 160,000 miles divided by 40,000 miles equals 4.

So, if the trucker starts the year with a fresh set of tires, he will need to change his tires 4 times throughout the year, meaning he will use a total of 5 sets of tires.

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What inequality represents the graph?

Answers

x>(-8). The line is going to the right, increasing,which means x is greater than -8,but isn't equal to that because the point is open.
Final answer:

The inequality that represents the graph is y < x.

Explanation:

The inequality that represents the graph is y < x. This inequality represents the region below the line that forms the graph. In this case, the line starts at the origin and has a slope of 1, meaning that for every increase of 1 unit on the x-axis, the y-coordinate increases by 1 unit as well.

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X2+4x-3/X4-5X2+4 what is the domain of this function

Answers

domain is the value of x
the demonimator cannot be zero
factor the denominator: (x^2-1)(x^2-4)≠0
factor again: (x+1)(x-1)(x+2)(x-2)≠0
x≠1,-1,2,-2
the domain is all real number except 1,-1,2,-2

What are the sine, cosine, and tangent of 5 pi over 4 radians?

Answers

[tex]sin( \frac{5 \pi }{4}) = 0.07 [/tex] rounded to two decimal places 

If you have a scientific calculator, you can work this out by first change the setting from degree to radian

[tex]cos( \frac{5 \pi }{4}) = 0.998 [/tex] rounded to three decimal places

[tex]tan( \frac{5 \pi }{4}) = 0.069 [/tex] rounded to three decimal places

Answer:

[tex]\sin\dfrac{5\pi}{4}=-\dfrac{1}{\sqrt{2}}[/tex]  

[tex]\cos\dfrac{5\pi}{4}=-\dfrac{1}{\sqrt{2}}[/tex]  

[tex]\tan\dfrac{5\pi}{4}=1[/tex]  

Step-by-step explanation:

Given : [tex]\theta =\dfrac{5\pi}{4}[/tex]

The angle is on radian.

We need to find the sine, cosine and tangent.

[tex]\sin\theta =\sin(\frac{5\pi}{4}[/tex]

[tex]\sin\theta =\sin(\pi+\frac{\pi}{4}[/tex]

[tex]\sin\theta =-\sin(\frac{\pi}{4}[/tex]      [tex]\because \sin(\pi+\theta)=-\sin\theta[/tex]

[tex]\sin\dfrac{5\pi}{4}=-\dfrac{1}{\sqrt{2}}[/tex]  

[tex]\cos\theta =\cos(\frac{5\pi}{4}[/tex]

[tex]\cos\theta =\cos(\pi+\frac{\pi}{4}[/tex]

[tex]\cos\theta =-\cos(\frac{\pi}{4}[/tex]      [tex]\because \cos(\pi+\theta)=-\cos\theta[/tex]

[tex]\cos\dfrac{5\pi}{4}=-\dfrac{1}{\sqrt{2}}[/tex]  

[tex]\tan\theta =\tan(\frac{5\pi}{4}[/tex]

[tex]\tan\theta =\tan(\pi+\frac{\pi}{4}[/tex]

[tex]\tan\theta =\tan(\frac{\pi}{4}[/tex]      [tex]\because \tan(\pi+\theta)=\tan\theta[/tex]

[tex]\tan\dfrac{5\pi}{4}=1[/tex]  

Consider a paint-drying situation in which drying time for a test specimen is normally distributed with σ = 7. the hypotheses h0: μ = 75 and ha: μ < 75 are to be tested using a random sample of n = 25 observations. (a) how many standard deviations (of x) below the null value is x = 72.3? (round your answer to two decimal places.) standard deviations (b) if x = 72.3, what is the conclusion using α = 0.01? (round your answers to two decimal places.) test statistic z = critical value z = what can you conclude? reject the null hypothesis. there is sufficient evidence to conclude that the mean drying time is less than 75. do not reject the null hypothesis. there is sufficient evidence to conclude that the mean drying time is less than 75. do not reject the null hypothesis. there is not sufficient evidence to conclude that the mean drying time is less than 75. reject the null hypothesis. there is not sufficient evidence to conclude that the mean drying time is less than 75. (c) what is α for the test procedure that rejects h0 when z ≤ −2.8? (round your answer to four decimal places.) α = (d) for the test procedure of part (c), what is β(70)? (round your answer to four decimal places.) β(70) = (e) if the test procedure of part (c) is used, what n is necessary to ensure that β(70) = 0.01? (round your answer up to the next whole number.) n = specimens (f) if a level 0.01 test is used with n = 100, what is the probability of a type i error when μ = 76? (round your answer to four decimal places.)

Answers

Part A:

The z score of the hypothesis testing of n samples of a normally distributed data set is given by:

[tex]z= \frac{x-\mu}{\sigma/\sqrt{n}} [/tex]

Given that the population mean is 75 and the population standard deviation is 7, then the number of standard deviation of the mean for x = 72.3 is given by the z score:

[tex]z= \frac{72.3-75}{7/\sqrt{25}} \\ \\ = \frac{-2.7}{7/5} = \frac{-2.7}{1.4} \\ \\ =-1.93[/tex]

Therefore, 72.3 is 1.93 standard deviations below the mean.



Part B:

The test statistics of the hypothesis testing of n samples of a normally distributed data set is given by:

[tex]z= \frac{x-\mu}{\sigma/\sqrt{n}} [/tex]

Thus given that x = 72.3, μ = 75, σ = 7 and n = 25,

[tex]z= \frac{72.3-75}{7/\sqrt{25}} \\ \\ = \frac{-2.7}{7/5} = \frac{-2.7}{1.4} \\ \\ =-1.93[/tex]

The p-value is given by:

[tex]P(-1.93)=0.03[/tex]

Since α = 0.01 and p-value = 0.03, this means that the p-value is greater than the α, ant thus, we will faill to reject the null hypothesis.

Therefore, the conclussion is do not reject the null hypothesis. there is not sufficient evidence to conclude that the mean drying time is less than 75.



Part C

In order to reject the null hypothesis, the p-value must be less than or equal to α.

The p-value for z ≤ -2.8 is 0.00256.

Therefore, the α for the test procedure that rejects the null hypothesis when z ≤ −2.8 is 0.0026



Part D:

In general for the alternative hypothesis , [tex]H_a :\mu\ \textless \ \mu_0[/tex]

[tex]\beta(\mu') = P\left(X \ \textgreater \ \mu_0-z_{1-\alpha}\frac{\sigma}{\sqrt{n}}|\mu'\right) \\ \\ = 1-P\left(-z_{1-\alpha}+\frac{\mu_0-\mu'}{\sigma/\sqrt{n}}\right) [/tex]

So for the test procedure with α = 0.0026

[tex]\beta(70) = 1 - P\left(-z_{0.9974}+\frac{75-70}{7/5}\right) \\ \\ =1 - P(-2.7949+3.5714)=1-P(0.7765) \\ \\ =1-0.78128\approx\bold{0.2187 }[/tex]



Part E:

For α = 0.0026, and a general sample size n we have that

[tex]\beta(70) = 1 - P\left(-z_{0.9974}+\frac{75-70}{7/\sqrt{n}}\right) \\ \\ =1 - P\left(-2.7949+ \frac{5}{7/\sqrt{n}} \right)[/tex]

Since, we want n so that β(70) = 0.01, thus

[tex]1 - P\left(-2.7949+ \frac{5}{7/\sqrt{n}} \right)=0.01 \\ \\ \Rightarrow P\left(-2.7949+ \frac{5}{7/\sqrt{n}} \right)=1-0.01=0.99 \\ \\ \Rightarrow P\left(-2.7949+ \frac{5}{7/\sqrt{n}} \right)=P(2.3262) \\ \\ \Rightarrow -2.7949+ \frac{5}{7/\sqrt{n}}=2.3262 \\ \\ \Rightarrow \frac{5}{7/\sqrt{n}}=5.1211 \\ \\ \Rightarrow \frac{7}{\sqrt{n}} = \frac{5}{5.1211} =0.9764 \\ \\ \Rightarrow \sqrt{n}= \frac{7}{0.9764} =7.1695 \\ \\ \Rightarrow n=(7.1695)^2=51.4[/tex]

so we need n = 52.



Part F:

p-value = [tex]P-value=P(\bar{X}\leq\bar{x}) \\ \\ =P(\bar{X}\leq72.3)=P\left(z\leq \frac{72.3-76}{7/5} \right) \\ \\ =P\left(z\leq \frac{-3.7}{1.4} \right)=P(z\leq-2.643) \\ \\ =\bold{0.00411}[/tex]

Since p-value is larger that .01 we fail to reject µ = 76.

A paint drying situation, has the standard deviation 1.93. The detailed solution is given below.

Given :

Standard Deviation, [tex]\sigma = 7[/tex]

Mean, [tex]\mu = 75[/tex]

Sample, n = 25

Solution :

A) We know that,

[tex]z = \dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n} }}[/tex]     ---- (1)

Now put the values of [tex]\rm x,\;\mu,\;\sigma \;and \;n[/tex] in equation (1) we get,

[tex]z = \dfrac{72.3-75}{\dfrac{7}{\sqrt{25} }}[/tex]

z = -1.93

Therefore, 72.3 is 1.93 standard deviations below the mean.

B) From the above part we know that z = - 1.93.Therefore p-value is,

P(-1.93) = 0.03

Since [tex]\alpha[/tex] = 0.01 and p-value = 0.03, this means that the p-value is greater than the fail to reject the null hypothesis.

C) The p-value for [tex]z\leq -2.8[/tex]

is 0.00256

Therefore, the [tex]\alpha[/tex] for the test procedure that rejects the null hypothesis when [tex]z\leq -2.8[/tex] is 0.0026.

D) For alternate hypothesis,

[tex]\rm \beta (\mu') = P(X>\mu_0-z_1_-_\alpha \frac{\sigma}{\sqrt{n} }|\mu')[/tex]

[tex]\rm = P(-z_1_-_\alpha +\dfrac{\mu_0-\mu'}{\dfrac{\sigma}{\sqrt{n} }})[/tex]

For [tex]\alpha[/tex] = 0.0026

[tex]\rm \beta (70)=1- P(-z_0_._9_9_7_4 +\dfrac{75-70}{\dfrac{7}{\sqrt{25} }})[/tex]

[tex]\rm \beta (70) = 1-P(-2.7949+3.5714)=1-P(0.7765)[/tex]

[tex]\beta (70)=1-0.78128\approx 0.2187[/tex]

E) Now we want n when

[tex]\beta (70) = 0.01[/tex]

[tex]\rm 0.01=1- P(-z_0_._9_9_7_4 +\dfrac{75-70}{\dfrac{7}{\sqrt{n} }})[/tex]

[tex]P(-2.7949+\dfrac{5}{\dfrac{7}{\sqrt{n} }})=0.99[/tex]

[tex]P(-2.7949+\dfrac{5}{\dfrac{7}{\sqrt{n} }})=P(2.3262)[/tex]

[tex]-2.7949+\dfrac{5}{\dfrac{7}{\sqrt{n} }}=2.3262[/tex]

[tex]\rm \sqrt{n} = 7.1695[/tex]

n = 51.4

Therefore we need n = 52.

F)

[tex]\rm p-value = P(\bar{X}\leq \bar{x})[/tex]

[tex]\rm p-value = P(\bar{X}\leq 72.3)=P(z\leq \dfrac{72.3-76}{\dfrac{7}{5}})[/tex]

[tex]\rm p-value = P(z\leq -2.643)[/tex]

[tex]\rm p-value = 0.00411[/tex]

Since p-value is larger that .01 therefore we fail to reject [tex]\mu[/tex] = 76.

For more information, refer the link given below

https://brainly.com/question/21586810

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