Question

The surface area of a sphere is 615.44 square meters. Which equation can be used to find the radius of the sphere? Recall the formula S A = 4 pi r squared. 615.44 = 4 pi r 615.44 = 4 pi r squared 615.44 = (4 pi r) squared 615.44 = 4 pi r squared + 2 pi r

Answer 1

`\textit{surface area of a sphere}\\\\ SA=4\pi r^2 ~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ SA=615.44 \end{cases}\implies 615.44=4\pi r^2 \\\\\\ \cfrac{615.44}{4\pi }=r^2\implies \sqrt{\cfrac{615.44}{4\pi }}=r`