Team 7 expects to sell 260,000 units of product in year three of their plan. the best case sales in year three are estimated to be 320,000 units and worst case sales 200,000 units. assuming a pert distribution, what is the average demand per week in year three? what is the standard deviation of demand per week in year three?

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.