Solve the Problem. -The Time T in Seconds for a Pendulum of Length

Multiple Choice

Solve the problem.
-The time T in seconds for a pendulum of length L feet to make one swing is given by How long is a pendulum (to nearest hundredth) if it makes one swing in 2.1 seconds? Use 3.14 for ?.

A) 23.17
B) 145.53
C) 3.69
D) 36.38