Precalculus (6th Edition) Blitzer

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

Chapter 4 - Cumulative Review Exercises - Page 648: 19


$1540\ Btu/hr$

Work Step by Step

Step 1. Based on the given conditions, we can set up the model equation as $R=\frac{k}{d}$ where $d$ is the thickness and $k$ is a constant. Step 2. At $d=3.5\ in$; we have $R=\frac{k}{3.5}=2200\ Btu/hr$. Thus $k=7700\ Btu\cdot in/hr$ Step 3. At $d=5\ in$, we have $R=\frac{7700}{5}=1540\ Btu/hr$
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