The circumference of a circle is 18π ft. What is the area, in square feet? Express your answer in terms of \piπ.
HELp pls

Answers

Answer 1

Answer:

A = 81 pi  ft^2

Step-by-step explanation:

We know the circumference of a circle is given by

C = 2 * pi *r

18 pi = 2 * pi *r

Divide each side by 2 pi

18 pi / ( 2pi) = 2 pi r / ( 2pi)

9 = r

We can find the area by

A = pi r^2

A = pi ( 9)^2

A = 81 pi  ft^2


Related Questions

Determine whether each of the following sequences are arithmetic, geometric or neither. If arithmetic, state the common difference. If geometric, state the common ratio.

-4, 12, -36, 108, -324, …
My answer below?
12, - 4 = 8
4 -12= -8 (neither)

Answers

[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

[tex] \textbf{Let's see if the sequence is Arithmetic or Geometric :} [/tex]

[tex] \textsf{If the ratio between successive terms is } [/tex] [tex] \textsf{equal then, the terms are in GP} [/tex]

[tex] \sf{ \dfrac{12}{-4} = -3} [/tex]

[tex] \sf{ \dfrac{-36}{12} = -3} [/tex]

[tex] \textsf{Since the common ratio is same, } [/tex] [tex] \textsf{we can infer that it's a geometric progression} [/tex] [tex] \textsf{with common ratio of -3} [/tex]

Answer:

okay

Step-by-step explanation:

[tex]for arithmetic \: progression \: there \: must \: be \: a \: common \: difference \\ \\ to \: get \: common \: difference \: {d} \: \\ get \: the \: the \: term \: infront \: minus \: the \: term \: before \\ say \: d = 12 - ( - 4) = 16 \\ d = - 36 - 12 = - 48 \\ d = 108 - ( - 36) = 144 \\ since \: d \: isnt \: uniform \: this \: is \: not \: arithmetic \: progression \\ \\ for \: geometric \: progression \: there \: must \: be \: a \: common \: ratio \: {r} \\ r \: is \: got \: by \: dividing \: the \: term \: infront \: by \: the \: term \: behind \\ \\ say \: r = 12 \div ( - 4) = - 3 \\ r = ( - 36) \div 12 = - 3 \\ r = 108 \div ( - 36) = - 3 \\ since \: r \: is \: the \: same \: this \: is \: a \: geometric \: serie[/tex]

find the domain and range there a picture
explain

Answers

Answer:

Below.

Step-by-step explanation:

The Domain is All Real x.

The minimum value of f(x) is -9, so:

the range is f(x) ≥ -9.

Opal is buying chocolates and flowers for valentine's day. She pays $15 for each bouquet and $5.80 for each box of chocolates. Her total bill comes out to $218.20 and she bought a total of 17 items. How bouquets and how many boxes of chocolates did she buy?

Answers

Set your equation up

$15(b)+$5.80(c)=$218.20

B + C =17 Total

15(13)+5.80(4)=218.20

13+4=17 Total

Answer is 13 bouquets and 4 boxes of chocolate.

The number 56 represents the number of

Answers

Answer:

56 is: The sum of the first six triangular numbers (making it a tetrahedral number). The number of ways to choose 3 out of 8 objects or 5 out of 8 objects, if order does not matter. The sum of six consecutive primes (3 + 5 + 7 + 11 + 13 + 17)

Step-by-step explanation:

hope this helps:) mark me brainliest if you want !!

which function is graphed?

Answers

Answer:

The answer is C

Step-by-step explanation:

the left graph end in x<2 and the right one in x≥2

Someone please help me I don’t understand this

Answers

Answer:

huh

Step-by-step explanation:

Please help it’s algebra polynomials. 10 points

Answers

Answer:

(x+2)(7x+2)

Step-by-step explanation:

[tex]7x^{2} +16x+4\\\\7x^{2} +2x+14x+4\\\\\\x(7x+2)+2(7x+2)\\\\\\(x+2)(7x+2)[/tex]

pls help its due today

Answers

Answer:

My reasonable answer would be that it was a translation and then dilation

Step-by-step explanation:


???help????????imfailing

Answers

Answer:

Hi nice girl follow me I love you

Kellen runs for at least 1 hour but for no more than 2 hours. He runs at at an average rate of 6.6 kilometers per hour. The equation that models the distance he runs for t hours is d=6.6t

Find the theoretical and practical domains of the equation.

Select ALL correct answers.

Question 4 options:

The practical domain is all real numbers.


The theoretical domain is all real numbers.


The theoretical domain is all real numbers greater than or equal to one and less than or equal to two.


The practical domain is all real numbers greater than or equal to one and less than or equal to two.

Answers

B is true; pi= ~3.14. 3+4 is equal to 7, so because pi is greater than 3, pi+4>7

A business advertises that everything in the store is an additional 10% off the already reduced prices. marcus picks out 2 shirts that are on a 30% off rack. if the shirts are originally priced at $28.99 and $30.29 and there is 6% sales tax, how much does marcus end up paying for them? a. $39.59 b. $37.70 c. $37.35 d. $35.57

Answers

The amount that marcus end up paying for the two shirts originally priced  at $28.99 and $30.29 is given by: Option A: $39.59

How to find the percentage from the total value?

Suppose the value of which a thing is expressed in percentage is "a'

Suppose the percent that considered thing is of "a" is b%

Then since percent shows per 100 (since cent means 100), thus we will first divide the whole part in 100 parts and then we multiply it with b so that we collect b items per 100 items(that is exactly what b per cent means).

Thus, that thing in number is

[tex]\dfrac{a}{100} \times b[/tex]

For this case, we're given that:

Cost of two shirts originally is $28.99 and $30.29

30% is off on each of them, so we get:

New price of each shirt = Old price of each shirt - 30% of old price of each shirt

New price of each shirt = [tex]28.99 - \dfrac{28.99}{100} \times 30[/tex] and [tex]30.29- \dfrac{30.29}{100} \times 30[/tex]

This sums up to $41.496

Now, at this price, there'd be application of 10% additional discount.

That will make the new price as:

[tex]41.496 - \dfrac{41.496}{100} \times 10 =37.3464[/tex]

Now, on this price, there'd be applied 6% sales tax

So, the amount he paid for 2 shirts = discounted price + 6% tax on discounted amount

= [tex]37.3464 + \dfrac{37.3464}{100} \times 6 \approx 39.59 \: \rm dollars[/tex]

Thus, the amount that marcus end up paying for the two shirts originally priced  at $28.99 and $30.29 is given by: Option A: $39.59

Learn more about percent here:

https://brainly.com/question/11549320

What is the surface area of a cube that’s measured 8 inches

Answers

Answer:

2

Step-by-step explanation:

Haven't done this in awhile but I think it's 2 because if you cube 2 it comes to 8. L x W x H = 8 | 2 x 2 x 2 = 8

Isabella notices that when she doesn't study for a test, on average she makes a 45. Isabella also realizes that for every hour
she studies, on average she scores an additional 7 points. Which of the following represents G, her average test score when
she studies for h hours?
OA 7+45h=G
OB. 7-45h= G
OC 45 - 7h=G
OD. 45 + 7h= G

Answers

Answer: D

Her test score is higher PER every hour she studies.

Mr. and Mrs. Hodges are shopping for

a new vehicle. They found these prices

for cars that suit their family's needs:
26,500 23,400, 19,950, 47,800 16,800 18,400



What are the mean and median of the

prices they found?

Answers

Answer:

See below

Step-by-step explanation:

Arrange the list in ascending order

16 800   18400    19 950    23 400    26 500    47 800

MEDIAN is the middle number ...since there are TWO in the middle it is the average of the two    (19950 + 23400) /2 = 21675

MEAN is the average...add all of the numbers and divide by 6

   = 25475

solve for x x + 21 = -2x

Answers

Answer

-7

Step-by-step explanation:

x + 21 = -2 x

-x          -x

21 = -3 x

---    -----

-3      -3

-7 = x

Can anyone help please?

Answers

Answer:

1)8293

2)8378

srry thts all i could answer :/

Step-by-step explanation:

What is the probability that if a coin lands on heads and the number cube shows 5

Answers

Answer:

Not sure

Step-by-step explanation:

Well I’m just guessing these numbers but…

For the coin it is one minus the probability of the coin landing on tails minus the tiny probability of the coin landing on its edge and balancing there. So something like (1 - 0.499 999 5 - 0.000 001), or 0.499 995; call it as near 0.5 as makes no difference.

For the number cube it is one minus the probability of the cube landing on one, three or five minus the tiny probability of the coin landing on an edge or the even tinier probability of it landing on a corner and balancing there. So something like (1 - 3 * 0.166 666 - 12 * 0.000 000 36 - 8 * 0.000 000 08) , or 0.499 998; call it as near 0.5 as makes no difference.

So the joint probability is the first probability times the second. So 0.5 * 0.5 which is 0.25 for all intents and purposes

(copied from Quora)

what is BOC? please help me!

Answers

OA, OB, and OC are all radii of the circle so they have the same length, 12 in. ∆ AOB is therefore isosceles, so the angles at the vertices A and B are congruent. The interior angles of any triangle sum to 180° in measure, so

30° + 2 m∠A = 180°   ⇒   m∠A = 75°

Draw an altitude in ∆ AOB that connects the vertex O to the midpoint of AB; this is the height h of ∆ AOB and bisects ∆ AOB into two 15°-75°-90° right triangles. Solve for h and the length of the base AB using trigonometry:

sin(15°) = (AB/2) / (12 in)   ⇒   AB = (24 in) sin(15°) ≈ 6.212 in

sin(75°) = h / (12 in)   ⇒   h = (12 in) sin(75°) ≈ 11.591 in

Then the area of ∆ AOB is

1/2 (AB) h = (144 in²) sin(15°) sin(75°)

= (72 in²) (cos(60°) - cos(90°))

= 36 in²

where we use the identity

sin(x) sin(y) = 1/2 (cos(x - y) - cos(x + y))

Let m∠BOC = θ. Then

(area of sector BOC) / θ = (area of ⊙O) / 360°

Solve for θ :

θ = (area of sector BOC) / (area of ⊙O) • 360°

θ = (36 in²) / (π (12 in)²) • 360°

θ = (90/π)° ≈ 28.648°

The five sales people at Southwest Appliances

earned commissions last year of $20,000, $35,000 $40,000,

$18,000, and $32,000. Find the mean commission.

Answers

The mean commission is 12,000

A researcher decides to split scores on an exam into quartiles. She determines that a score of 64 is at the 25th percentile, a score of 74 is at the 50th percentile, and a score of 80 is at the 75th percentile. What is the interquartile range (IQR) for these data

Answers

Answer:          IQR = 16

Step-by-step explanation:

The given data is 25 th percentile is 64, 50th percentile is 74 and 75 th percentile is 80.

percentage : 25    50   75

 score        : 64    74    80

Median:- The median is obtained by first arranging the data in ascending or descending order and applying the following rule.

If the number of observations is odd, then the median is  observation

term

If the number of observations is even, then the median is  observation and  observations.

given n=3, middle term is '74'

In this given data the median is (M) = 74

Interquartile range IQR = median of upper half-median of lower half

                                      = 80-64

                                      = 16

                           IQR = 16

There are seven cows in a pasture and five of those cows are red. What
fraction of the cows are red?

Answers

Answer:

5/7

Step-by-step explanation:

Since we have 7 cows in total our denominator would be 7 for now. 5 of the cows are red, so 5/7. Since we can't simplify 5/7 that is our final answer.

Hope this helps!!

Write the standard form equation of each circle.

Center: (-11, -8) Radius: 4

Center: (-6, -15) Radius: square root of 5

Answers

Answer:

(x+11)^2 + (y+8)^2 = 4^2/16

(x+6)^2 + (y+15)^2 = 5

Step-by-step explanation:

the standard equation of a circle is

(x-h)^2 + (y-k)^2 = r^2 where (h,k) is the center and r is the radius

in the first equation -11 is h and -8 is k

so (x+11)^2 because when you subtract a negative the double negative creates a positive and that’s the same for (y+8)^2

so (x+11)^2 + (y+8)^2 = 4^2 or 16

in the second equations -6 is h and -15 is k

and the double negative is also effective in this equation so (x+6)^2 and (y+15)^2 therefore, (x+6)^2 + (y+15)^2 = 5 (the square root of 5 squared is just 5)

hope this helps :)

The population of Augusta, WI, had a population of 1253 in 2000. If the population increased by 3% each year, what would be the population of Augusta in 2016? 2611 2010 1854 601

Answers

Answer:

2010

Step-by-step explanation:

What is the measure of angle z in this figure?



Enter your answer in the box.

z =
°

Answers

Answer:

z = 137°

Step-by-step explanation:

[tex]z^{o} =(180-43)^{o} =137^{o}[/tex]

Hope this helps

What is an equivalent decimal for 6.0250?

Answers

decimal from 6.0250 to 60250. is moving it four decimal places, so that is the same as multiplying by 1 followed by four zeros). This means that an equivalent fraction is 60250 / 10000.

Determine the equation of the line with the following characteristics.

Slope 3, passing through (2,3) and (-1,9)

Answers

Answer:

y = 3x - 3

Step-by-step explanation:

Given, (2,3) and (-1,9), m = 3

Equation of a straight line is y = mx + c

Here, y = 3, x = 2 and m = 3

Substituting the values in y = mx + c we get,

3 = 3(2) + c

c + 6 = 3

c = 3 - 6

c = -3

So, the equation of the line is y = 3x - 3  (Answer).


17) What happens to a vertical line if you rotate it 90 degrees clockwise?
A) The image is a ray that points to the left
B) The image line is 90 times as long
C) The image is a vertical line
D) The image is a horizontal line

Answers

Answer:

d

Step-by-step explanation:

rotating vertical 90degrees will be horsontal and vice versa

D

Vertical line has 90 degrees, if you rotate it 90 degrees, the angle becomes 90+90=180 degrees. Horizontal line has 180 degrees.



arc GT = 18 degrees, arc TA =32 degrees, arc NA =112 degrees, arc IN = 74 degrees. find measure of angle GET

Answers

Answer:

Step-by-step explanation:

Please help!!
Find the measure of the arc or angle indicated.

A. 60°
B. 90°
C. 30°

Answers

Answer: A

Step-by-step explanation:

im SUPER confused who's Candice?

Answers

Answer:

Whoes Joe?

Step-by-step explanation:

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