Find the unknown length, x. Write your answer in simplest radical form. A. 32
B. 4 square root 64
C.64
B.4 square root 514

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.