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Calculate the sound level in decibels of a sound wave that has an intensity of 2.25 µW/m2

For this question don't I use B=log10(I/IO)
So it would be B=log10(2.25/1.0e-12) right?

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2.25 microwatts is a millionth of a watt, or 2.25x10^-6 W/m^2. This is divided by 1e-12, so the solution is:
B=10log10(2.25e+6)

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