In a drawing of a bus, the length is 5 cm. If the scale used is 1 cm: 9 ft, what is the actual length of the bus?

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.