Holly had $5,000 in her bank account. she withdrew $800 to buy a new bike. what is the percent decrease in the balance of her account? the percent decrease is 1.6%. the percent decrease is 16%. the percent decrease is 84%. the percent decrease is 120%.

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?