Find the Requested Function Value for the Given Function $f ( x ) = \sqrt { 2 x - 9 }$

Find the requested function value for the given function. Round the answer to the nearest tenth when necessary.
-If $f ( x ) = \sqrt { 2 x - 9 }$ , find the value of $f ( 29 )$ .

A) 7
B) $7.6$
C) 58
D) 49