A tiny source emits sound uniformly in all directions. The intensity level ar a dist. Of 2m is 100dB. How much sound power is the soure emitting?

Answer 1

db = 10*Log W/Wo = 100
10*Log W/10^-12 = 100
Log W/10^-12 = 10
Log W - Log 10^-12 = 10
Log W = 10 + Log 10^-12 = 10-12 = -2
W = 10^-2 = 0.01 Watts.

Answer 2

You didn’t calculate the power you calculated the intensity . To calculate power use I=Power/4pieR^2