Precalculus (10th Edition)

by Sullivan, Michael

Published by Pearson

ISBN 10: 0-32197-907-9

ISBN 13: 978-0-32197-907-0

Appendix A - Review - A.1 Algebra Essentials - A.1 Assess Your Understanding - Page A13: 138

Answer

$S=4\pi r^2$.

Work Step by Step

The surface area of a sphere is $S$ while the radius is $r$, The surface area is $4$ times $\pi$ times the square of the radius hence $S=4\pi r^2$

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