Answer
$2.25$
Work Step by Step
$E=kW$, thus here $3=k\cdot20$, so $k=0.15$
Thus if $W=15$, then $E=0.15\cdot15=2.25$
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter 2 - Section 2.5 - Variation - 2.5 Assess Your Understanding - Page 192: 27
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