Question

the radius of a circle is 4 miles. what is the area? r = 4 mi give the exact answer in simplest form. square miles

Explanation:

Step1: Recall area formula

The formula for the area of a circle is $A = \pi r^{2}$, where $r$ is the radius.

Step2: Substitute radius value

Given $r = 4$ miles, substitute into the formula: $A=\pi\times(4)^{2}$.

Step3: Calculate result

$(4)^{2}=16$, so $A = 16\pi$ square - miles.

Answer:

$16\pi$