The quiz grades of a math class are given 81,75, 68, 97, 69, 81, 89, 74, 75, 82 91.90
The grades are normally distributed with a mean of 81 and a standard deviation of 92
What is the Z-score of the lowest grade in the quiz?
Round the answer to the nearest hundredth

Find the commission on a $590.00 sale if the commission is 15%.

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

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.