The image below is a triangle drawn inside a circle with center O:

Which of the following expressions shows the area, in square inches, of the circle?

(π = 3.14)

3 ⋅ 3.14 ⋅ 22
3.14 ⋅ 32
3.14 ⋅ 22
3.14 ⋅ 3

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.