1. The problem statement, all variables and given/known data The intensity at a distance of 6.0m from a source that is radiating equally in all directions is 6.0x10^-10 W/m^2. What is the power emitted by the source? They give you multiple choice answers, and the answer is 2.7x10-7 W. 2. Relevant equations I is proportional to 1/r^2. B = 10log(I/10^-12) 3. The attempt at a solution I dont really know how to approach getting the solution, I have tried working backwards from the solution and kind of got nowhere. I see no reason to use the decibel formula because there is no need to indicate loudness, so the only other formula I have to work with is a proportion. Could somebody please help me with the formulas/logic needed to solve this problem? I have a terrible professor and my book is no help. Thanks.