What is the area of an ellipse with the major axis 20 m and the minor axis 10 m? round your answer to the nearest whole number. a. 314 m2 b. 157 m2 c. 50 m2 d. 200 m2

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.