Answer:
-1080 gallons
Step-by-step explanation:
If the volume of water in the pool changes by -12 gallons every minute, we just have to multiply -12 by 90 to see how much it will change after 90 minutes. You can also look at it this way:
[tex]\frac{-12}{1} = \frac{x}{90}[/tex]
-12 times 90 is -1080, so this is the answer to our problem.
