Answer
$16$ inches
Work Step by Step
Since $s=r\theta$ for an arc length $s$, use values $\theta = 2 \, \textrm{rad.}$ and $r=8 \, \textrm{in.}$ to get $$s=(2 \, \textrm{rad.})(8 \, \textrm{in.})=16 \, \textrm{in.}$$
Functions Modeling Change: A Preparation for Calculus, 5th Edition
by Connally, Eric; Hughes-Hallett, Deborah; Gleason, Andrew M.; Cheifetz, Phil C.
Published by
Wiley
ISBN 10:
1118583191
ISBN 13:
978-1-11858-319-7
Chapter 7 - Trigonometry and Periodic Functions - 7.3 Radians and Arc Length - Exercises and Problems for Section 7.3 - Exercises and Problems - Page 284: 37
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