Solve the Problem $\mathrm { B } , 9.5$ Miles Due South Of

Solve the problem.
-A fire is sighted due west of lookout A. The bearing of the fire from lookout $\mathrm { B } , 9.5$ miles due south of $\mathrm { A }$ , is $\mathrm { N }$ $57.50 ^ { \circ } \mathrm { W }$ . How far is the fire from B (to the nearest tenth of a mile) ?

A) $19.7 \mathrm { mi }$
B) $20.7 \mathrm { mi }$
C) $17.7 \mathrm { mi }$
D) $18.7 \mathrm { mi }$