20% of the students in mr. macgregor’s class earned as on their final projects. 5% of the students who received as on their final projects also received as on their final exams. find the probability that a student chosen at random received an a on both the final exam and the final project.

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.