The intensity of sound is measured on the decibel scale, dB. The equation dB = 10 log i represents the decibel level, where i is the ratio of the sound to the human hearing threshold. A noise registers a decibel level of 29. Which equation could be used to find how many times greater the noise is than the human hearing threshold?
a) i = 10(2.9)
b) i = 10(2.0)
c) i = 10(1.9)
d) i = 10(2.9) / 10