Carter orders 120 glass ornaments online. He decides to test a random sample of 20 ornaments to predict the number of cracked ornaments in the order. How many random numbers should be generated to simulate this problem? (Enter a numerical answer only)

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.