#### Answer

$$ y'= -7.3t^{-8.3}.$$

#### Work Step by Step

Recall that $(x^n)'=nx^{n-1}$
Since $ y=t^{-7.3}$, then the derivative $ y'$ is given by
$$ y'= -7.3 t^{-7.3-1}=-7.3t^{-8.3}.$$

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Published by
W. H. Freeman

ISBN 10:
1464125260

ISBN 13:
978-1-46412-526-3

$$ y'= -7.3t^{-8.3}.$$

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