Which of the following is an equivalent expression for the volume of a rectangular prism that has a height of (1/2x-3) inches, length of (x+5) inches, and a width of (x-4) inches?

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.