Sara has 3 choices to get to school: walk, ride a bike, or ride the bus. She has the same choices to get home after school. If Sara randomly chooses how she is getting to school and home, what is the probability that she will walk to school and then ride the bus home? A. 2/9

B. 2/6

C. 1/6

D. 1/9

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.