A liter of water contains about 3.35*10^25 molecules. A certain river discharges about 1.9*10^8 L of water every second. About how many molecules does the river discharge every minute? Write your answer in scientific notation.

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.