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Find the area of a circle with a radius of 8 .
Either enter an exact answer in terms of
pi or use 3.14 for
pi and enter your answer as a decimal.
units
^(2)

Find the area of a circle with a radius of $8$ . $\newline$ Either enter an exact answer in terms of $\pi$ or use $3$ . $14$ for $\pi$ and enter your answer as a decimal. $\newline$ $\square$ units $^{2}$

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Negative Exponents

Full solution

Q. Find the area of a circle with a radius of

8

.

\newline

Either enter an exact answer in terms of

\pi

or use

3

.

14

for

\pi

and enter your answer as a decimal.

\newline

\square

units

^{2}

Recall formula for area: Recall the formula for the area of a circle, which is $A = \pi r^2$ , where $A$ is the area and $r$ is the radius.
Plug in radius: Plug the radius ( $8$ units) into the formula. So, $A = \pi \times 8^2$ .
Calculate radius squared: Calculate $8^2$ , which is $64$ .
Multiply by pi: Now, multiply $\pi$ by $64$ . If we use $3.14$ for $\pi$ , then $A = 3.14 \times 64$ .
Find the area: Do the multiplication to find the area. $A = 3.14 \times 64 = 200.96$ units $^2$ .

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