Answer
$494,000 \ W$
Work Step by Step
Since the units are the same, we have
$$
25,000\ W+17,900\ W+13,962\ W +8752\ +428,000 \ W=493614 \ W\approx494,000 \ W
.$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 6 - Cumulative Review - Page 265: 11
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