When a stone is dropped in a pond, ripples are formed and travel in concentric circles away from where the stone was dropped. The equation of the least-squares regression line is Area = 0.010 + 3.141 (Time^2) . What is the predicted area, in cm2, of the circle 8 seconds after the stone was dropped?


A. 25.14cm^2

B. 50.27 cm^2

C. 64.01 cm^2

D. 201.03 cm^2

Answers

Answer 1

Answer: D.

Step-by-step explanation: calculator

Answer 2

Answer:

d) 201.03

Step-by-step explanation:


Related Questions

1
What is the rule for the table? Start your rule with y =.
0/1
IN (x)
-4
-3
-2
-1
0
1
2
3
4
-7
OUT (y)
-5
-3
-1
1
3
5
9
7

Answers

Answer:

wsdf nbvc wer jhgf jhgfc

Step-by-step explanation: wed tgfd qwd

Y = +2
Have done these types of questions
Hope this helps

20. Find the slope of the line graphed below.

Answers

I don’t see a graph....
Their is no graph sorry

Howard bought a dish washer for $550. He made a down payment of $75 and paid the balance off in 12 monthly payments. Find the monthly payment if the interest rate was 11%.

Answers

Answer:

$900 for monthly payments

Step-by-step explanation:

$1450 in total

127.86
+78.95
+23.09

Answers

Answer:

229.9

Step-by-step explanation:

Answer:

229.9

Step-by-step explanation:

Uh easyyyyy lol



Find an equation for the line below.

Answers

Answer:

y=2/4x+4.5

Step-by-step explanation:

Use rise over run to get 2/4 and the line splits 4 and 5 to get 4.5

Hope this Helps :)

Answer:

Step-by-step explanation:

Unsure

what is baal veer? give all the bad and good fairies names i will mark those people as b brainiest

Answers

Answer:

The story revolves around a boy, Baal Veer, who is blessed with the powers of 7 fairies. Gaal Pari (Cheek Fairy), Vijhdar Pari (Electric Fairy), Baal Pari (Tress Fairy), Atkaati Pari (Obstacle Fairy), Aarpar Pari (Across Fairy), Bhatkati Pari (Wander Fairy), Natkhat Pari (Naughty Fairy) and Rani Pari (Queen Fairy) give magical powers to Baal Veer to help them fight an evil fairy Bhayankar Pari (Frightening Fairy), who wants to become the queen of Pari Lok (Fairy Realm). Years ago, Maa Pari (Mother Fairy) gave Pari Lok's (Fairy Realm's) throne to Bahuroopi Pari (Disguise Fairy) instead of Bhayankar Pari, who, at that time was Bhali Pari (Good Fairy), so she returns to take revenge from Maa Pari and Rani Pari. Baal Veer is sent to Earth to help children and to save Earth from Bhayankar Pari and the wrath of other cunning and cruel, evil fairies. Baal Veer stays with the Dagli family on Earth as Ballu. The family has seven members who never lie, even at the time of difficult circumstances, including Manav and Meher, who later receive powers from Rani Pari (they were made Baal Mitra and Baal Sakhi, respectively) and help Baal Veer in his quests and adventures.

Step-by-step explanation:

Jessie put $3,200 into a savings account that earns 3.5% annual compound interest. If she makes no other deposits or withdrawals, what will her balance be after 12 years?
-SHOW ALL WORK

Answers

Answer:

r = 35 / ( 3200 × 12 ) = 0.00091146

r = 0.00091146

converting r decimal to a percentage

R = 0.00091146 * 100 = 0.0911%/year

The interest rate required solve for the  simple interest of $ 35.00

from a principal of $ 3,200.00

over 12 years is 0.0911% per year.

Step-by-step explanation:

Jessie's balance after 12 years will be $4867.3

Initial investment of Jessie in the saving account = $3200

Annual compound Interest rate = 3.5% = 0.035

Given that she makes no withdrawal or deposits

Let us consider that the amount is compounded monthly

The Amount of the compound interest can be calculated by equation (1)

[tex]\rm A = P (1 +r/n)^{(nt)}.....(1)\\where \\A = Future \; amount\\r = Annual\; compound\; interest \; rate\\n = The\; number\; of\; times \; the \; interest\; rate\; is \; compounded\; per\; unit \; time\\ P = Initial \; amount \\t = Number \;of \; years\; for\; which\; investment\; is\; done[/tex]

 So for the given situation according to the given data

P = 3200

r = 0.035

n = 12 (considering compounded monthly)

t = 12 years

On putting these values in equation (1) we get

[tex]\rm A = 3200(1+0.035/12)^{12\times12} = 4867.3[/tex]

So Jessie's balance after 12 years will be $4867.3

For more information please refer to the link given below

https://brainly.com/question/14295570

Find the y-intercept of the following equation. Simplify your answer.

y = –10x − 8

Answers

Answer: -8

Step-by-step explanation: because the formula is mx+b=y and the -8 is the b

Evaluate the function at x = –2.


y = 3

y = –2

y = 2

y = 0

Answers

Y = 2 is the answer

Solve for x 7x^2+3x-2+0

Answers

Answer:

X=-1/3 and x=-2

Because (3x+1)(x+2)=0

3x+1=0 will give x=-1/3

x+2=0 will give x=-2

Step-by-step:

hth!

Which is equivalent to 3.25%?
0.0325
0.325
32.5
325

Answers

Answer:

a 0.0325

Step-by-step explanation:

0.325 because if you transfer a percent in to a decimal you will have to divide by 100 and get 0.0325

The equivalence of 3.25

3.25/100

=0.0325

Rewrite the equation in Standard Form: 2=y-2x

Answers

Answer:

Standard Form: 2x - y = -2

Plsss help ASAP!!!!!!

Answers

Answer:

Its either A or D because its reflection so that cancels out B and C

im not sure if this helps u or not but at lest it cancels out 2 of the options

The reflection of a horizontal line has the same result as a rotation of 90 degrees clockwise.

Step-by-step explanation:

When an image is rotated 90 degrees counterclockwise the shape is still congruent but in a different quadrant. The same is true when an image is reflected across a horizontal line.

6th grade math I mark as brainliest

Answers

Answer:

A

Step-by-step explanation:

Exponents are representations of repeated multiplication.

For example: 5³ = 5 x 5 x 5 or 125. If we want to compare values, we must evaluate each expression and then compares the final values for each.

3⁶ = 3 x 3 x 3 x 3 x 3 x 3 = 729

6³ = 6 x 6 x 6 = 216

729 > 216

We can immediately notice that 3⁶ is much larger than 6³

Find the volume of the cube.

Answers

Answer:

60 cm & 60 mL

Hope this helps! Let me know if this is right or not.

QUICKLY!!!!!!!!!!
Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional questions. Online Content: Site 1 When graphing inequalities, where can the solutions be found?

Answers

Answer:

what do u need help with

Send the pic of the thing u need help with

lucia draws a square and plots the center of the square. (image)

Answers

Answer:

C

Step-by-step explanation:

Lucia's claim is correct since any rotation that is a multiple of 45° carries a square onto itself

a). Se pretende construir un invernadero, en un terreno que presenta una pendiente del 10%. Por lo tanto se requiere nivelarlo, con el método de nivelación simple. Los datos que aparecen en la figura son los obtenidos en campo. Calcular;
.
a). El desnivel entre los puntos A y B.
b). La lectura que deberá tomarse en el punto B, si el nivel está correcto

Answers

i think its a sorry if wrong

How many 40 seconds are in one whole?

Answers

Answer:

huh?

Step-by-step explanation:

Minute? Hour?

The amount of time required for an oil and filter change on an automobile is normally distributed with a mean of 45 minutes and a standard deviation of 10 minutes. 1)If a random sample of 16 cars is selected, a) what is the probability that the sample mean will be between 39 and 48 minutes? b) 95% of all sample means will fall between what two values? c) 90% of the sample means will be greater than what value? 2)What sample size is needed in order for the standard deviation of the mean to be one fifth of the population standard deviation?

Answers

Answer:

1a

  [tex]P(39 < X < 48 ) = 0.8767[/tex]

1b

    95% of all sample means will fall between [tex] 40.1  <  \mu < 49.9 [/tex]

1c

    [tex]\= x = 41. 795[/tex]

2

   [tex]n = 25[/tex]

Step-by-step explanation:

From the question we are told that

   The mean is [tex]n = 45[/tex]

   The population standard deviation is  [tex]\sigma = 10[/tex]

   The sample size is n  =  16

Generally the standard error of the mean is mathematically represented as

       [tex]\sigma_{x} = \frac{ \sigma}{\sqrt{n} }[/tex]

=>    [tex]\sigma_{x} = \frac{ 10 }{\sqrt{16 } }[/tex]

=>    [tex]\sigma_{x} = 2.5[/tex]

Generally the probability that the sample mean will be between 39 and 48 minutes is

    [tex]P(39 < X < 48 ) = P( \frac{ 39 - 45}{ 2.5} < \frac{X - \mu }{\sigma } < \frac{ 48 - 45}{ 2.5} )[/tex]

=> [tex]P(39 < X < 48 ) = P(-2.4 < Z< 1.2 )[/tex]

=> [tex]P(39 < X < 48 ) = P( Z< 1.2 ) - P(Z < -2.4)[/tex]

From the z table  the area under the normal curve to the left corresponding to  1.2  and  -2.4  is

=> [tex]P( Z< 1.2 ) = 0.88493[/tex]

and  

    [tex]P( Z< - 2.4 ) = 0.0081975[/tex]

So

   [tex]P(39 < X < 48 ) = 0.88493 -0.0081975[/tex]

=> [tex]P(39 < X < 48 ) = 0.8767[/tex]

From the question we are told the confidence level is  95% , hence the level of significance is    

      [tex]\alpha = (100 - 95 ) \%[/tex]

=>   [tex]\alpha = 0.05[/tex]

Generally from the normal distribution table the critical value  of   is  

   [tex]Z_{\frac{\alpha }{2} } =  1.96[/tex]

Generally the margin of error is mathematically represented as  

      [tex]E = Z_{\frac{\alpha }{2} } *  \frac{\sigma }{\sqrt{n} }[/tex]

=>   [tex]E = 1.96 * 2.5 [/tex]  

=>   [tex]E =4.9 [/tex]  

Generally the  95% of all sample means will fall between

      [tex]\mu -E <  and  \mu  +E[/tex]

=>   [tex]45  -4.9\  and \ 45  + 4.9[/tex]

Generally the value which  90% of sample means is  greater than is mathematically represented

      [tex]P( \= X > \= x ) = 0.90[/tex]

=>   [tex]P( \= X > \= x ) = P( \frac{\= X - \mu }{ \sigma_x} > \frac{\= x -45 }{ 2.5} ) = 0.90[/tex]

=>  [tex]P( \= X > \= x ) = P( Z > z ) = 0.90[/tex]

Generally from the z-table  the critical  value  of  0.90  is  

      [tex]z = -1.282[/tex]

      [tex]\frac{\= x -45 }{ 2.5} = -1.282[/tex]

=>   [tex]\= x = 41. 795[/tex]

Considering question 2

 Generally we are told that the standard deviation of the mean to be one fifth of the population standard deviation, this is mathematically represented as

         [tex]s = \frac{1}{5} \sigma[/tex]

  Generally the standard deviation of the sample mean is mathematically  represented as

          [tex]s = \frac{\sigma }{ \sqrt{n} }[/tex]

=>       [tex]\frac{1}{5} \sigma = \frac{\sigma }{ \sqrt{n} }[/tex]

=>       [tex]n = 5^2[/tex]

=>       [tex]n = 25[/tex]

Using the normal distribution and the central limit theorem, it is found that:

1)

a) 0.8767 = 87.67% probability that the sample mean will be between 39 and 48 minutes.

b) 95% of all sample means will fall between 40.1 and 49.9 minutes.

c) 90% of the sample means will be greater than 41.8 minutes.

2) A sample size of 25 is needed.

In a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

It measures how many standard deviations the measure is from the mean.  After finding the z-score, we look at the z-score table and find the p-value associated with this z-score, which is the percentile of X. By the Central Limit Theorem, the sampling distribution of sample means of size n has standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].

In this problem:

The mean is of 45 minutes, hence [tex]\mu = 45[/tex].The standard deviation is of 10 minutes, hence [tex]\sigma = 10[/tex].Sample of 16 cars, hence [tex]n = 16, s = \frac{10}{\sqrt{16}} = 2.5[/tex].

Item 1, question a:

The probability is the p-value of Z when X = 48 subtracted by the p-value of Z when X = 39, hence:

X = 48:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

By the Central Limit Theorem

[tex]Z = \frac{X - \mu}{s}[/tex]

[tex]Z = \frac{48 - 45}{2.5}[/tex]

[tex]Z = 1.2[/tex]

[tex]Z = 1.2[/tex] has a p-value of 0.8849.

X = 39:

[tex]Z = \frac{X - \mu}{s}[/tex]

[tex]Z = \frac{39 - 45}{2.5}[/tex]

[tex]Z = -2.4[/tex]

[tex]Z = -2.4[/tex] has a p-value of 0.0082.

0.8849 - 0.0082 = 0.8767

0.8767 = 87.67% probability that the sample mean will be between 39 and 48 minutes.

Item b:

The critical value for a 95% confidence interval is |z| = 1.96, hence:

[tex]Z = \frac{X - \mu}{s}[/tex]

[tex]-1.96 = \frac{X - 45}{2.5}[/tex]

[tex]X - 45 = -1.96(2.5)[/tex]

[tex]X = 40.1[/tex]

[tex]Z = \frac{X - \mu}{s}[/tex]

[tex]1.96 = \frac{X - 45}{2.5}[/tex]

[tex]X - 45 = 1.96(2.5)[/tex]

[tex]X = 49.9[/tex]

95% of all sample means will fall between 40.1 and 49.9 minutes.

Item c:

Greater than the 10th percentile, which is X when Z has a p-value of 0.1, so X when Z = -1.28.

[tex]Z = \frac{X - \mu}{s}[/tex]

[tex]-1.28 = \frac{X - 45}{2.5}[/tex]

[tex]X - 45 = -1.28(2.5)[/tex]

[tex]X = 41.8[/tex]

90% of the sample means will be greater than 41.8 minutes.

Item 2:

This is n for which [tex]s = \frac{10}{5} = 2[/tex], hence:

[tex]s = \frac{\sigma}{\sqrt{n}}[/tex]

[tex]2 = \frac{10}{\sqrt{n}}[/tex]

[tex]2\sqrt{n} = 10[/tex]

Simplifying both sides by 2:

[tex]\sqrt{n} = 5[/tex]

[tex](\sqrt{n})^2 = 5^2[/tex]

[tex]n = 25[/tex]

A sample size of 25 is needed.

A similar problem is given at https://brainly.com/question/14789302

Trevor made this number pattern 2,9,16,23,30,37 if the pattern continues what will be the eight number be

Answers

Answer:

44

Step-by-step explanation:

Nora makes $3000 a month. If she spends 15% of that on medical bills each month, how much does she spend on medical bills?

Answers

she spends $450 a month. 3,000•.15=450

Determine whether each ordered pair is a solution of the system.
5-7x+2y2 =-10
1-5x-2y =-22

a) (-4,-6)
b) (6,4)

Answers

According to the system:

5 – 7x + 2y² = -10

1 – 5x – 2y = -22

______________

a) No ; (4, 6) is not a solution to the

system. This point does not touch either equation.

b) No ; (6, 4) is not a solution to the system. This point does not touch either equation.

Solutions:

[tex]( \frac{122 - 3 \sqrt{101}}{25}, \frac{ - 7 +3 \sqrt{101}}{10}) ≈ (3.674, 2.315) \\ ( \frac{122 + 3 \sqrt{101}}{25}, \frac{ - 7 - 3 \sqrt{101}}{10}) ≈ (6.086, -3.715) [/tex]

x = ( 122 ∓ 3√101 ) / 25 ≈ 3.674 or 6.086

y = ( -7 ± 3√101 ) / 10 ≈ 2.315 or -3.715

Can someone please help, ty!!
(Will mark brainliest)

Answers

Answer:

6th graders

Step-by-step explanation:

The median is actually just the line inside the box of the box-and-whisker plot.

Notice that for 6th graders, the median is at about 2.4, while for 4th graders, the median is at about 1.5.

Clearly, the 6th graders have the higher median.

Solve the absolute value equation :| 10n - 8| + 16 = 4

Answers

(10n -8)+16=4 the absolute value equation is 8(-10n-2)+5=101
Answer:

 [tex]\boxed{n=-2}[/tex]

Solution Steps: - Steps for solving an absolute value equation-

______________________________

1.) Find the absolute value:[tex]|10n-8|=10n+8[/tex]

- Absolute value just means if there is any negatives then make them positive.

Equation at the end of this step:

[tex]10n+8+16=4[/tex]

2.) Add 8 and 16:[tex]8+16=24[/tex]

Equation at the end of this step:

[tex]10n+24=4[/tex]

3.) Subtract 24 from both sides:[tex]24-24=[/tex] Cancels out[tex]4-24=-20[/tex]

- Since it was adding, you do the opposite, which is why we subtracted.

Equation at the end of this step:

[tex]10n=-20[/tex]

4.) Divide both sides by 10:[tex]10n[/tex] ÷ [tex]10=n[/tex][tex]-20[/tex] ÷ [tex]10=-2[/tex]

- Since it was multiplying, you do the opposite, which is why we divided.

______________________________

help help HELP ASAP.
1 a negative
2 a positive​

Answers

Answer:

a negative

Step-by-step explanation:

Answer:

Negative

Step-by-step explanation:

The fact that the market value falls below the maintenance cost, shows that the at the current value of the car is negative.

help meee plzzzzzzzz

Answers

Answer:

450 cm i think

How do you write
25/4
as a percentage?

Answers

Answer:

625%

Step-by-step explanation:

Convert fraction (ratio) 25 / 4 Answer: 625%

Answer:

Google says 625% and 6.25 as a decimal

Native people in the Amazon Rainforest use a toxin to help them catch fish. The toxin interferes with the gas exchange in the fish which makes them slow and easy to catch. Which of the following describes what is occurring to the cellular respiration in the fish?

A . The fish are unable to take in oxygen and cannot convert glucose into ATP

B. The fish are unable to take in ATP and cannot produce glucose for energy

C. The fish are unable to make glucose from sunlight

D. The fish are unable to take in carbon dioxide and cannot make ATP

Answers

Answer:

A

Step-by-step explanation:

The thing that will occur to the cellular respiration in the fish is A. The fish are unable to take in oxygen and cannot convert glucose into ATP.

Cellular respiration refers to the metabolic pathway that helps in the breaking down of glucose and the production of ATP.

In this case, since there is toxin that is put in the river to help them catch fish, the fish will be unable to take in oxygen and would not be able to convert glucose into ATP.

Read related link on:

https://brainly.com/question/1404493

what is the unit rate for $290 for 18

Answers

Answer:

16.1

Step-by-step explanation:

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