Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 8 Rational Functions - 8.1 Model Inverse and Joint Variation - 8.1 Exercises - Problem Solving - Page 557: 42c


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Work Step by Step

From earlier parts we have: $P=\frac{aWD^2}{L}$. Hence if all dimensions are doubled, then $P'=\frac{a(2W)(2D)^2}{(2L)}=\frac{a2W4D^2}{2L}=\frac{4aWD^2}{L}=4P$. Thus $P$ becomes 4 times as much as it was.
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