The density of a fish tank is 0.5fish over feet cubed. There are 30 fish in the tank. What is the volume of the tank?

You just told us that there is an average of 1/2 fish in each cubic foot of tank.

We instantly calculated that there is an average of 1 fish in each 2 ft³.

(30 fish) / (1 fish/2 ft³) = 60 ft³

This is the only way you can handle the given information

and wind up with a quantity with units of volume.

60

Step-by-step explanation:

These questions are kind of easy, take the given number, in this case it is 30 fishes, and : that by 0.5. If you had the number of feet instead of the fishes, it would be more like 60 * 0.5 which is splitting 60 in half. I hope that everyone who is stuck with this question no longer is. Best of luck on your test!