The number of goldfish in a tank is 12 and the volume of the tank is 45 square feet. what is the density of the tank? . . a. 0.27 goldfish per cubic feet. b. 3.75 goldfish per cubic feet. c. 33 goldfish per cubic feet. d. 57 goldfish per cubic feet

We are given with the number of goldfish of 12 and the volume of tha tank is 45 cubic feet. To determine the density of the tank we divide the number of goldfish by the volume of the tank. In this problem, we divide 12 goldfishes by 45 cubic feet. This is equal to 0.27 goldfish per cubic feet. Answer is A.

Maybe you meant 45 cubic feet which is a unit for volume. If it is a unit of area, then other data might be needed.

Assuming 45 cubic feet is the volume of the tank,

Solving for the density in terms of number of goldfish per cubic feet of the tank:
 
density = number of goldfish per cubic feet of the tank
density = 12 goldfishes / 45 cubic feet = 0.27 goldfish/cubic feet of the tank

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.