Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 6 - The Circular Functions and Their Graphs - 6.1 Radian Measures - 6.1 Exercises - Page 575: 90

Answer

(a) $39,616$ (b)$62.9\ mi$, yes.

Work Step by Step

(a) Assume the number of rotations of a tire in 1 hr is $n$, as we know the car will travel $55 miles =55\times5280\times12\ in$, we have $14\times n\times2\pi=55\times5280\times12$, thus $n\approx39,616$ (b) In this case, the number of turns is $n=39,616$ and the total distance is given by $L=16\times39,616\times2\pi\approx3982634.7\ in \approx62.9\ mi$ in one hours, which means he deserves a speeding ticket.
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