How Do You Convert dB to W/m^2 for a Test?

[tiger1]

Homework Statement

I have a test coming up and I need to be able to convert dB to W/m^2 and vise versa. Could someone please explain to me how to do this?

Homework Equations

B=(10dB) log_10(I/I_0)
I_0 = 1.0*10^-12W/m^2

The Attempt at a Solution

Google, came up with nothing

 

[Gear300]

Solve for I --- B/(10dB) = log_10(I/I_0)
10^(B/10dB) = (I/I_0)
I = (I_0)10^(B/10dB)