Question

Kaitlin's fish tank has 15 liters of water in it. She plans to add 6 liters per minute until the tank has at least 63 liters. What are the possible numbers of minutes

Kaitlin could add water?
User for the number of minutes.
Write your answer as an inequality solved for t.

Answer 1

15 + 6t >= 63

t >= (63 - 15) / 6

t >= 4.5

t >= 5 (since t must be a whole number of minutes)

So the possible numbers of minutes Kaitlin could add water are 5, 6, 7, 8, ... (any whole number greater than or equal to 5). This can be written as t >= 5.