Answer
$\text{(b)}\;\frac{4}{3}\pi r^3$
Work Step by Step
The volume $V$ of a sphere is equal to the $\frac{4}{3}$ times $\pi$ times cube of the radius, hence
$V=\frac{4}{3}\pi r^3$.
Therefore, the correct option is $\text{(b)}$.
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.2 Geometry Essentials - A.2 Assess Your Understanding - Page A19: 6
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