Solve the problem.Use the formula d = 10 log (I/I0), where the loudness of a sound in decibels is determined by I, the number of watt/m2 produced by the soundwave, and 
watt/m2. A certain noise measures 81 decibels. If the intensity is multiplied by 10, how many decibels will the new noise measure? Round to the nearest decibel.
A. 81 decibels
B. 91 decibels
C. 810 decibels
D. 82 decibels
Answer: B
Mathematics
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