Answer
See below.
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.
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
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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