Solve. {d+e=2 {d−e=4 use the substitution method. there are an infinite number of solutions. there is no solution. the solution is (5, 1). the solution is (3, −1).

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.