Sophia exchanged 1000 U. S. dollars for the South African currency which is called the rand. The exchange rate was 8.05 rand to 1 dollar please explain how you know

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.