Find the height, x, of the tree. 20 points for this question 79.03 ft
111.80 ft
124.74 ft
70.83 ft

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.