What is the total area of the shaded region in the figure

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.

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.