Determine whether AB and MN are parallel, perpendicular, or neither. Graph each line to verify your A(-2,-7). B(4,2), M(-2, 0), N(2,6)

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.