What is one similarity and one difference when applying the commutative property to addition vs. multiplication?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Which expression is rational? 6. , square root two, square root 14, square root 49

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.