Match each function to its domain

Perform the required operations on the following functions given: f(x)= 3-x; g(x)= -2x find g[f(x)]

Triangle xyz has vertices x(1,3), y(0,0)

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.