Select the expression that is equivalent to 2x+11x?-212

for x *-3 or 0.

x²+3x

2x+5- .

6

X+3

2x + 17 – 20

X+3

2x + 17-

36

+3x

2x+5 - 36

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.