Question

the radius of a circle is 10 miles. what is the circumference? give the exact answer in simplest form.

Explanation:

Step1: Recall circumference formula

The formula for the circumference of a circle is $C = 2\pi r$, where $r$ is the radius.

Step2: Substitute radius value

Given $r = 10$ miles, substitute into the formula: $C=2\pi\times10$.

Step3: Simplify the expression

$C = 20\pi$ miles.

Answer:

$20\pi$