The Level of a Sound in Decibels Is Calculated Using $D = 10 \cdot \log \left( I \times 10 ^ { 12 } \right)$

Multiple Choice

The level of a sound in decibels is calculated using the formula $D = 10 \cdot \log \left( I \times 10 ^ { 12 } \right)$ where I is the intensity of the sound waves in watts per square meter. The softest sound that a human can hear has an intensity of 10-12 watts per square meter. How many decibels is that?

A) 10
B) 24
C) -12
D) 0