Answer
$19.7527$
Work Step by Step
$P'(m)$ = $73.3\times(\frac{3}{4})(m^{-\frac{1}{4}})$ = $54.975m^{-\frac{1}{4}}$
$P'(60)$ = $54.975\times60^{-\frac{1}{4}}$ = $19.7527$
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