Answer
Please see the work below.
Work Step by Step
We know that
$\frac{dU}{dt}=\frac{dQ}{dt}+\frac{dW}{dt}$
This can be rearranged as:
$\frac{dQ}{dt}=\frac{dU}{dt}-\frac{dW}{dt}$
We plug in the known values to obtain:
$\frac{dQ}{dt}=45-165$
$\frac{dQ}{dt}=-120W$