Answer
See below.
Work Step by Step
$A=2\pi rw\\r=\frac{A}{2\pi w}$
Thus plugging in $A=120,w=4$: $r=\frac{120}{2\pi 4}=\frac{15}{\pi}\approx 4.8$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 1, Equations and Inequalities - 1.4 Rewrite Formuilas and Equations - 1.4 Exercises - Skill Practice - Page 31: 18
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