Answer
l=8
Work Step by Step
Choice 3 contains the variables E, R, l.
$l=\frac{E}{R}=\frac{120}{15}=8$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 1 - Section 1.4 - Formulas - Exercise - Page 22: 9
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