A water tank will be drained at a constant rate of 42.4 liters per hour starting at 9:00 A.M. After one hour, the change in the amount of water in the tank can be represented as –42.4. Which of the following represents the total change in the amount of water in the tank by 9:00 A.M. the next day?

Answer 1

well, how many hours in a day?

-42.4 * 24

Answer 2

-66.0