If y varies directly with x, write an equation for the direct variation. if y= 14 when x= 8 find y when x= 12. find y when x= 15 if y= 6 when x=30. if y= 6 when x= 24, what is the value of x when y= 7? find x when y= 14, if y= 7 when x= 8.

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.