I need help on my math

What is the multiplicative rate of change of the exponential function shown on the graph?

Issof claims that the scale factor is 1/2. which statement about his claim is correct

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.