#### Answer

c)

#### Work Step by Step

In order to determine how much the efficiency will change, you need to know the original value of $T_h$. After all, efficiency depends on how much the value of $T_h$ is above the value of $T_c$.

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Published by
Pearson

ISBN 10:
0-134-98855-8

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

c)

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