Solve the Problem $P$ (In $W$ ) Generated by a Particular Windmill Is Given By

Solve the problem.
-The power $P$ (in $W$ ) generated by a particular windmill is given by $P=0.015 V^{3}$ , where $V$ is the velocity of the wind (in $\mathrm{mph}$ ) . Estimate the instantaneous rate of change of power with respect to velocity when the velocity is $7.7 \mathrm{mph}$ . (Round to one decimal.)

A) $13.7 \mathrm{~W} / \mathrm{mph}$
B) $0.3 \mathrm{~W} / \mathrm{mph}$
C) $5.9 \mathrm{~W} / \mathrm{mph}$
D) $2.7 \mathrm{~W} / \mathrm{mph}$