#### Answer

25 MJ

#### Work Step by Step

The energy used is 10 MJ. However, the process of harvesting that energy at the power plant is only 40% efficient. Thus, we find:
$ E= \frac {10 MJ}{.4}=25 MJ$

Published by
Pearson

ISBN 10:
0-134-98855-8

ISBN 13:
978-0-13498-855-9

25 MJ

You can help us out by revising, improving and updating this answer.

Update this answerAfter you claim an answer you’ll have **24 hours** to send in a draft. An editor
will review the submission and either publish your submission or provide feedback.