Answer
$l=3\pi=9.42\text{ feet}$
Work Step by Step
$$l=\frac{\theta}{360^\circ}\times2\pi r=\frac{60^\circ}{360^\circ}\times2\pi(9)=3\pi=9.42\text{ feet}$$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 6 - 6.1 - Angles and Their Measure - 6.1 Exercises - Page 432: 78
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