Physics 11th grade

A) What is the intensity of sound at 148 dB? Units: W/m^2. I found this to be 630.9573445 using Io*10^B/10 in which B= 148 dB.
B)Compare it to that of a whisper at 20 dB. Using the same formula i find this to be 1e-8 but it is marked as wrong.

Please help with B!

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  1. I get 6309 W/m^2 for A and 10^-10 W/m^2 for B.

    Do you have the correct Io ?

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  2. The Io i used was (1*10^-12) for A and (1*10^-10) for B. That was according to my physics book. I got A correct with 630.9573445 W/m^2.

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