Answer
$56$ inches
Work Step by Step
If W varies directly with S, then $W=kS$ for some constant k.
Given $W=16.8$ when $S=150$, we find k:
$16.8=k\cdot 150$
$k=\displaystyle \frac{16.8}{150}=0.112$
When S=500 inches,
$W=0.112(500)=56$ inches
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 7 - Functions and Graphs - Review Exercises: Chapter 7 - Page 497: 48
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