Question

The area of a circle is modeled by the equation A = pir2. Rewrite the equation in terms of the circle's radius r. In yourfinal answer, include all of your calculations.

Answer 1

$\begin{gathered} A=\pi\times r^2 \\ \text{divide both sides by }\pi \\ \frac{A}{\pi}=r^2 \\ \text{square root both sides} \\ \sqrt[]{\frac{A}{\pi}}=\sqrt[]{r^2} \\ r=\sqrt[]{\frac{A}{\pi}} \end{gathered}$