Question

Carl uses a pump to drain a swimming pool. The pool initially holds 40 kiloliters.

Assume Carl can pump the water out at a constant rate of 5 killiters per hour
(a) Find a formula for W. the number of kiloliters of water in the pool at time t.

Answer 1

W = 40-5t

W = water
40 is the starting value
5 is how much the water drains per hour