If R(x) = x2 - 2 and 9(x) = x-3, what is (fºg)(x)? (fog)(x) = x +7
(fºg)(x) = x2 - 6x+7
(fog)()= x2 – 3x+7
(fºg)(x)=x2-5

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function. a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.