The answer would be B because all 3 angles on a triangle must add up to 180 degrees. Since the two angles you do know add up to 80, you need the last angle to be 100 degrees.
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ik how do do this just give me a few minutes and i will give it to
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.