Assume that the number of liters of water remain-
ing in the bathtub varies quadratically with the number of minutes
which have elapsed since you pulled the plug.
a. If the tub has 38.4.21.6, and 9.6 liters remaining at 1, 2, and 3
minutes respectively, since you pulled the plug, write an equa-
tion expressing liters in terms of time.
b. How much water was in the tub when you pulled the plug?
When will the tub be empty?
d. In the real world, the number of liters would never be negative.
What is the lowest number of liters the model predicts? Is this
number reasonable?