Which equation is true?
i. 56 ÷ 4·7 = 82 ÷ (11 + 5)
ii. (24 ÷ 8 + 2)3 = (42 + 9)2
a. i and ii
b. ii only
c. i only
d. neither i nor ii

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.