Afactory makes tv's and video machines. checking for faults regularly, on average, 5 out of every 300 tv's are faulty and 8 out of every 200 video machines are faulty.
a) if i check two tv's and 1 video machine at random, what's the probability that exactly one of them is faulty?
b) how many tv's must be checked so that the probability of at least one being faulty is greater than 0.95.

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.