Choose the function to match the graph???

A. f(x) = log x - 4
B. f(x) = log x + 4
C. f(x) = log (x - 4) )
D. f(x) = log (x + 4)

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.