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gulaghasi [49]
3 years ago
9

The circumference of a circle is 16π cm. What is the area, in square centimeters? Express your answer in terms of \piπ.

Mathematics
2 answers:
TiliK225 [7]3 years ago
7 0

Answer:

64\pi

Step-by-step explanation:

The area of a circle can be found using:

a=\pi r^{2}

We have the circumference, but we need the radius. Circumference can be found using:

c=2\pi r

We know the circumference is 16\pi, so we can substitute that in for c

16\pi =2\pi r

We need to solve for r, or the radius. To do this, divide both sides by 2\pi. This will get r by itself.

16\pi /2\pi =2\pi r/2\pi  

8=r

Now we know the radius, and can substitute it into the area formula

a=\pi r^2

Substitute 8 in for r

a=\pi 8^2

a=64\pi

This answer is expressed in terms of pi, since it includes pi in the answer. Therefore, the area, in terms of pi is 64\pi

zepelin [54]3 years ago
4 0

Answer:

64 pi

Step-by-step explanation:

lmk if you need an explanation

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The city of Raleigh has 11700 registered voters. There are two candidates for city council in an upcoming election: Brown and Fe
Vesnalui [34]

Answer:

The sample statistic for the proportion of voters surveyed who said they'd vote for Brown is 0.308.

The expected numbers of voters who would vote for Brown is 3604.

Step-by-step explanation:

The sample statistic is a numerical quantity used to represent a characteristic of a sample. For example, sample mean is a sample statistic representing the average of the sample. Or, sample proportion is a sample statistic representing the proportion of a particular variable in the sample. Or sample variance is a sample statistic representing the variance of the sample.

The sample statistic can be used to estimate the population parameter.

They are known as the point estimate of the parameter.

The sample proportion of a variable <em>X</em> is given by:

\hat p=\frac{X}{n}

It is provided that of the <em>n</em> = 250 registered voters selected, the number of voters who said they would vote for Brown is <em>X </em>= 77.

Compute the sample statistic for the proportion of voters surveyed who said they'd vote for Brown as follows:

\hat p=\frac{X}{n}

  =\frac{77}{250}\\

  =0.308

Thus, the sample statistic for the proportion of voters surveyed who said they'd vote for Brown is 0.308.

Compute the expected number of people of the 11700 registered voters who would vote for Brown as follows:

E(X)=N\times \hat p

         =11700\times 0.308\\=3603.6\\\approx 3604

Thus, the expected numbers of voters who would vote for Brown is 3604.

6 0
3 years ago
PLEASE ANSWER. I WILL GIVE BRAINLIEST FAST
mr_godi [17]

Answer:

It is a right triangle

Step-by-step explanation:

4 0
3 years ago
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Pavlova-9 [17]

Answer:

14 in

Step-by-step explanation:

4+12+4+4+4=28/2= 14

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Can someone explain to me how to do this? I just don't get it.
Maksim231197 [3]

Answer:

x=130

Step-by-step explanation:

triangle=180

180-34-96=50

line=180

180-50=130

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2 years ago
Write the equation that represents the line graphed below​
rodikova [14]

Answer:

(2,-6)

Step-by-step explanation:

If it's not that then(-6,2)

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