Answer
$720,000\ W$
Work Step by Step
Since we have the same units, then we have
$$
18,000 \ W+ 260,000 \ W+ 2300 \ W+ 45,500\ W+ 398,000 \ W\\
=723, 800\ W\approx 720,000~W$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 4 - Review - Page 208: 23
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