Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 2 - Section 2.5 - Zeros of Polynomial Functions - Exercise Set - Page 379: 63


a. $(7.8,2000)$ and $(10,2000)$. b. $(0,15)$

Work Step by Step

a. The solutions are the intersections of $y=200$ with the curve at $x=7.8\ in$ and $x=10\ in$, as indicated in the figure with points $(7.8,2000)$ and $(10,2000)$. b. As volume needs to be positive, based on the graph, a realistic domain would be $0\lt x\lt 15\ in$ or $(0,15)$
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