Solve the Problem $40 \mathrm { mi }$ B) $20 \mathrm { mi }$

Multiple Choice

Solve the problem.
-Find the missing length in the following right triangle. If necessary, round to the nearest tenth.

A) $40 \mathrm { mi }$
B) $20 \mathrm { mi }$
C) $6.3 \mathrm { mi }$
D) $10 \mathrm { mi }$