Answer:

Step-by-step explanation:
The computation of the total amount of water needed could be determined by using the volume formula which is shown below:

where
L = length,
W = width,
and D = depth.
Now putting the values to the above formula
Therefore, the total amount of water needed is 
We simply applied the above formula
Answer:
A, f(2) is the answer because it fits into the requirements.
20-8=12
12-3=9
9-6=3
3 fish are in a bowl.
Have a fab sunday!