What is the sound level for a noise that has an intensity of 7.6 × 10-4 watts/m2?

Sound intensity:  7.6 × 10-4 watts/m2?

To solve this problem you have to understand the threshold of hearing (Level) 

Io = 10^−12 W/m²

Solve the problem: 
"LI = 10×log (I / Io) dB = 10×log (7.6×10^−4 / 10^−12) dB"

and the answer is 88.81dB

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https://answers.yahoo.com/question/index?qid=20130217095248AALXBjj

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