Writing use the commutative property of addition to write an expression equivalent to a+2. use pencil and paper. explain how you could use the commutative property to you work with the expression 18 a 2 a 2 enter your answer in the answer box save for late esc a & hbb % # 0 8 7 6 5 4 3 2 p o y t r e q fab

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.