Abox contains 2 white, 3 red, and 4 black marbles. you choose two marbles and each are chosen at random. find the probability that: 1. both marbles are black? 2. one marble is white and the other is black? 3. one marble is white and the other is not black?

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.