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 $g ( 7 )$ .

A) $2 \sqrt { 30 }$
B) $\sqrt { 30 }$
C) $3 \sqrt { 29 }$
D) $\sqrt { 29 }$