I The decibel rating D is related to the sound intensity I by the formula D = 10 log10 for the noise level in decibels. 16 10 (a) Let D and d represent the decibel ratings of sounds of intensity I and i, respectively. Using properties of logarithms, find a simplified formula for the difference between the two ratings, D-d, in terms of the two intensities I and i. D-d=10log(1) help (logarithms) (Enter log 10 or logten for the base 10 logarithm.) (b) If a sound's intensity quadruples, how many decibels louder does the sound become? 6.02 decibels help (numbers)