Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 7 - Section 7.6 - Radical Equations and Problem Solving - Exercise Set - Page 455: 69

Answer

$\dfrac{\pi}{2} \text{ seconds OR approximately }1.57\text{ seconds} $

Work Step by Step

Substituting $ l=2 $ in the given equation, $ P=2\pi\sqrt{\dfrac{l}{32}} ,$ results to \begin{array}{l}\require{cancel} P=2\pi\sqrt{\dfrac{2}{32}} \\ P=2\pi\sqrt{\dfrac{1}{16}} \\ P=2\pi\sqrt{\left(\dfrac{1}{4}\right)^2} \\ P=2\pi\left(\dfrac{1}{4}\right) \\ P=\dfrac{\pi}{2} \\\text{OR}\\ P\approx1.57 .\end{array} Hence, the period, $P,$ is $ \dfrac{\pi}{2} \text{ seconds OR approximately }1.57\text{ seconds} .$
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