Answer
16
Work Step by Step
We first find the constant, k: $$12 =\frac{k}{20} \\ k=240$$ Thus, when V=15: $$ 15=\frac{240}{W} \\ 15W =240 \\ W =16$$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 6 - Test - Page 406: 28
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