The time between arrivals of customers at an automatic tellermachine is an exponential random variable with a mean of 5minutes. a) what is the probability that more than threecustomers arrive in 10 minutes? b) what is the probability that the time until the 5thcustomer arrives is less then 15 minutes?

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

Needmax recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

Cone a has a surface area of 384 ft2 and cone b has a surface area of 96 ft? . what is the ratio of their volume?