Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 3 - Equations and Problem Solving - Chapter 3 Test - Page 139: 14


$64\pi \space cm^2$

Work Step by Step

The circle's circumference is $16\pi$ and the formula for the circumference is $d\pi$ or $2r\pi$. That means the diameter of the circle is 16 and the radius is 8. The formula for the area of a circle is $\pi r^2$, and plugging in the radius gives: $\pi 8^2 = 64\pi$ centimeters squared
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