Ellie is using a hose to fill an underground water tank. The tank already had 60 liters of water in it when she turned on the hose. Water flows into the tank at a rate of 45 liters per minute. However, Ellie doesn't know that the tank has a leak in it. Water leaks out of the tank at a rate of 0.2 liters per minute.
Which function describes the amount of water in the tank after t minutes?
The function that describes the amount of water in the tank after t minutes is:
f(t) = 60 + (45 - 0.2)t