Diane is culturing bacteria that have a growth rate of 15% per hour. If the current population is 24,000 bacteria, how many bacteria will there be in 10 hours? If necessary, round your answer to the nearest whole number.

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?