Solve the Problem $21 ^ { \circ } 32 ^ { \prime }$

Multiple Choice

Solve the problem.
-Bob is driving along a straight and level road straight toward a mountain. At some point on his trip he measures the angle of elevation to the top of the mountain and finds it to be $21 ^ { \circ } 32 ^ { \prime }$ . He then drives 1 mile $( 1 \mathrm { mile } = 5280 \mathrm { ft } )$ more and measures the angle of elevation to be $30 ^ { \circ } 9 ^ { \prime }$ . Find the height of the mountain to the nearest foot.

A) $649,689 \mathrm { ft }$
B) $64,969 \mathrm { ft }$
C) $6497 \mathrm { ft }$
D) $6597 \mathrm { ft }$