Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 9 - Section 9.4 - Variation and Problem Solving - Exercise Set: 58

Answer

$C=18\pi$ cm $A=81\pi$ cm$^2$

Work Step by Step

$C=2\pi r$ $C=2\pi (9)$ $C=18\pi$ $A=\pi r^2$ $A=\pi (9)^2$ $A=81\pi$
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