The measure, in degrees, of the three angles of a triangle are given by 2x + 1,3x - 3, and 9x. whar is the measure of the smallest angle

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.