Question

The area of a circular trampoline is 115.88 square feet. What is the radius of the trampoline? Round to the nearest hundredth.

Answer 1

$\bf \textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\ -----\\ A=115.88 \end{cases}\implies 115.88=\pi r^2 \\\\\\ \cfrac{115.88}{\pi }=r^2\implies \sqrt{\cfrac{115.88}{\pi }}=r$