The volume of a fish tank is 30 cubic feet. if the density is 0.3fish over feet cubed, how many fish are in the tank?
a.100
b10
c9
d3

We are given the following values:

Volume of fish tank = 30 cubic feet

Density of fish = 0.3 fish / 1 cubic feet

To solve for the number of fish in the tank, all we have to do is to multiply the given values such that in the units only the fish will remain. Therefore the number of fish inside the tank is calculated as:

number of fish in the tank = Volume of fish tank * Density of fish

number of fish in the tank = (30 cubic feet) (Density of fish = 0.3 fish / 1 cubic feet)

number of fish in the tank = 9 fish

Therefore there are only a total of 9 fish inside the tank.

C. 9