You place a cup if 210 degree Fahrenheit coffee on a table in a room that is 68 degree Fahrenheit and 10 minutes later it is 200 degree Fahrenheit. Approximately how long will it be before the coffee is 180 degree Fahrenheit?

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.