7. On the first day of her backpacking trip, Aimee hiked 11 miles due east and camped overnight. The next day, she X -- 13
took a trail at an angle of 23° northwest from the previous day and hiked 10 miles. How far will she have to hike on
the third day to go back to her starting place using the most direct route?

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.