Solve the Problem. -As One Approaches a Certain Sound Source, the Sound Intensity

Multiple Choice

Solve the problem.
-As one approaches a certain sound source, the sound intensity in arbitrary units increases according to the following function of time (in seconds) : Starting at t = 0, when the source of sound is first sensed, how much time elapses until maximum sound
Intensity is felt? Round the result to the nearest hundredth.

A) 33.28 sec
B) 1.28 sec
C) 20.34 sec
D) 0.45 sec