The density is 4, and the mass is 12.
So we just plug this into the equation
d = m/v
4 = 12/v
We know that the volume must be 3 to make the equation true, because 12/4 = 3.
Therefore, the answer is F. 3 cm ^3

gejoja

The answer is F. Because every 4 grams, there's a cm^3. So, you need to divide 12 by 4, and you get 3. The answer is 3 cm^3 :)