20\ -\ 9\ \times\ 2\ \div\left(2\ +\ 4^2\right)\ =\ 20 − 9 × 2 ÷(2 + 4

2

) =

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.