Solve the Problem $v$ In Feet Per Second of an Object (Neglecting Air Resistance)

Solve the problem.
-A formula used to determine the velocity $v$ in feet per second of an object (neglecting air resistance) after it has tallen a certain height is $v = \sqrt { 2 g h }$ , where $g$ is the acceleration due to gravity and h is the height the object has fallen. If the acceleration $g$ due to gravity on Earth is approximately 32 feet per second per second, find the velocity of a bowling ball after it has fallen 30 feet. (Round to the nearest tenth.)

A) $1920 \mathrm { ft }$ per sec
B) $31.0 \mathrm { ft }$ per sec
C) $7.7 \mathrm { ft }$ per sec
D) $43.8 \mathrm { ft }$ per sec