The lengths of the corresponding sides of two similar trapezoids are in the ratio 3: 5. if the area of the smaller trapezoid is 63sq inches, what is the area of the larger trapezoid?

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.