Construct a right triangle. Circumscribe a circle about the right triangle.
a. What relationship does the hypotenuse have with the circle?
b. What would be a quick way to find the center of the circle?

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.