For This Problem a and B Represent the Lengths of the Legs

Multiple Choice

For this problem a and b represent the lengths of the legs of a right triangle, and c represents the length of the hypotenuse. Find a if $c = 14$ and $b = 5$ inches. Express the answer in simplest radical form.

A) $\sqrt { 221 }$ inches
B) $- \sqrt { 221 }$ inches
C) $- 3 \sqrt { 19 }$ inches
D) $3 \sqrt { 19 }$ inches