Answer
$3.679\times10^{-7}\ W$
Work Step by Step
We must calculate the amount of work that the bee is doing, which is equal to $mg\Delta x$. Using this, we find:
$P=\frac{W}{\Delta t} = \frac{mg\Delta x}{\Delta t } = \frac{(2.5\times10^{-7})(9.81)(1.5\times10^{-3})(100)}{1}=3.679\times10^{-7}\ W$