Airplane Is Flying in Still Air with an Airspeed of Miles

Multiple Choice

airplane is flying in still air with an airspeed of miles per hour. If it is climbing at an angle of , find the rate at which it is gaining altitude. Round your answer to four Decimal places.

A) $103.7178 \mathrm { mi } / \mathrm { hr }$
B) $78.7993 \mathrm { milh }$
C) $111.7846 \mathrm { mi } / \mathrm { hr }$
D) $92.4589 \mathrm { mi } / \mathrm { hr }$
E) $91.3838 \mathrm { mi } / \mathrm { hr }$