9. The number of hours that the employees at the local Fry's grocery store worked last week is
normally distributed with a mean of 28 hours and a standard deviation of 4. What
percentage of employees worked between 24 and 36 hours?

Asales representative from a local radio station is trying to convince the owner of a small fitness club to advertise on her station. the representative says that if the owner begins advertising on the station today, the club's total number of members will grow exponentially each month. she uses the given expression to model the number of club members, in hundreds, after advertising for t months.