A mutual fund salesperson has arranged to call on 4 people tomorrow. Based on past experience the salesperson knows that there is a 20% chance of closing a sale on each call. Determine the probability distribution of the number of sales the salesperson will make.
Let S denote success, i. e. closing a sale P(S)=.20. Thus SC is not closing a sale, and P(SC)=.80

Q1) Draw probability tree
Q2) Construct the probability distribution table
Q3) Calculate the expected value

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

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.

The measure of angle 0 is 600 degrees