14. Below is the cost of a cell phone plan. The amount of GB of data used is represented by x. This plan charges to the nearest hundredth of a GB (no part
thereof). Find the cost of a month in which 6.66 GB of data is used.
cost = 60
if x <= 4
60 + 12(x - 4)
if x > 4

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.