Answer
$$0.6537 + 7.4715i$$
Work Step by Step
$$\eqalign{
& \left[ {2.5\left( {\cos 35^\circ + i\sin 35^\circ } \right)} \right]\left[ {3.0\left( {\cos 50^\circ + i\sin 50^\circ } \right)} \right] \cr
& {\text{Multiply use the product theorem}} \cr
& = \left( {2.5 \times 3.0} \right)\left[ {\cos \left( {35^\circ + 50^\circ } \right) + i\sin \left( {35^\circ + 50^\circ } \right)} \right] \cr
& = 7.5\left[ {\cos 85^\circ + i\sin 85^\circ } \right] \cr
& {\text{Use a calculator}} \cr
& \approx 0.6537 + 7.4715i \cr} $$
