Mr. brown needs 2 1/2 meters of materials to make a dress. how many similar dresses can be made from 35 meters of material?

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.