What is the point-slope form of a line with slope 3 that contains the point (2,1)? A. y+1=3(x+2)
B. y-2=3(x+1)
C. y-1=3(x-2)
D. y-2=3(x-1)

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.