Answer:
The amount of fluid used in 4 days will be 18 ounces
Step-by-step explanation:
Since each of them use 1 1/2 cups and they are 3
so the collective amount in 1 day will be
3 * 1 1/2 = 9/2
Now
The amount in 4 days will be
4 * 9/2 = 18
Therefore they will collectively use 18 ounces in 4 days
