Answer:
40
Explanation:
Hello, I think I can help you with this
you can solve this easily using a simple rule of three
Step one
define the relation and solve for x
if
1 gallon ⇒16 cups
2.5 gallons⇒x cups?

so, 2.5 gallons is the same amount as 40 cups
I hope it helps, Have a fantastic day.