Which equation has exactly ONE solution? A) 3 + 4x 2 = 2x + 1 B) 6 − 2x 2 = 15 + 2x C) 12x − 10 4 = 3x + 4 D) 4x − 20 4 = x − 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.