#### Answer

$25 \ \pi \approx 78.5 \ mi^2$

#### Work Step by Step

Let $A$ be the area of a circle. The area $(A)$ of a circle whose radius is $R$ is given by: $A=\pi r^2 ...(1)$
We are given that radius $r=5 \ mi$
Plug the data in the equation (1) to obtain:
$A=\pi (5)^2=\pi(25)$
Therefore, we get , $Area=25 \ \pi \approx 78.5 \ mi^2$