For the Given Function, Find the Indicated Function Value $g ( x ) = \sqrt { x ^ { 2 } - 20 }$

Multiple Choice

For the given function, find the indicated function value.
-For $g ( x ) = \sqrt { x ^ { 2 } - 20 }$ , find $g ( 3 )$ .

A) $3 \sqrt { 5 }$
B) $2 \sqrt { 3 }$
C) $\sqrt { 7 }$
D) Does not exist as a real number