Solve the Problem $L = 10 \cdot \log \frac { \mathrm { I } } { \mathrm { I } }$

Multiple Choice

Solve the problem.
-Use the formula $L = 10 \cdot \log \frac { \mathrm { I } } { \mathrm { I } }$ , where the loudness of a sound in decibels is determined by I, the number of watts per square meter produced by the sound wave, and I $0 = 10 ^ { - 12 }$ watts per square meter. What is the intensity of a noise measured at $56 \mathrm { db }$ ?

A) $2.7 \times 10 ^ { 14 }$ watts per square meter
B) $3.98 \times 10 ^ { - 7 }$ watts per square meter
C) $3.98 \times 10 ^ { - 6 }$ watts per square meter
D) $5.6 \times 10 ^ { - 10 }$ watts per square meter