Question

The Smiths are draining their 25,000 gallon swimming pool. It drains at a rate of 3,000 gallons an hour. Write a function that models the amount of water in the pool after t hours.
A) W = 25,000 - 3000t
Eliminate
B) W = 25,000 + 3000t
C) W = 3000 - 25,000t
D) W = 3000 + 25,000t

Answer 1

A is indeed correct, if you believe the model. In the real world, drain rate will depend on the amount of water left in the pool.

Answer 2

A is correct answer.