Solve the Right Triangle $$\theta = 50 ^ { \circ }$$

Multiple Choice

Solve the right triangle. If two sides are given, give angles in degrees and minutes.
-A conservation officer needs to know the width of a river in order to set instruments correctly for a study of pollutants in the river. From point A, the conservation officer walks 105 feet downstream
And sights point B on the opposite bank to determine that $$\theta = 50 ^ { \circ }$$ (see figure) . How wide is the river
(round to the nearest foot) ?

A) $80 \mathrm { ft }$
B) $88 \mathrm { ft }$
C) $125 \mathrm { ft }$
D) $163 \mathrm { ft }$