Suzanne ran 334 miles in the morning and 412 miles in the afternoon. how many kilometers did she run altogether? assume 1 mile = 1.6 kilometers. enter your answer, as a decimal, in the box

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.