Answer: 0.1875 grams per cm^3
Explanation:
First we need to find the volume of the cube
volume = length*width*height = 4*4*4 = 64 cubic cm
Then we'll divide the mass over this volume to get the density
density = mass/volume
density = (12 grams)/(64 cm^3)
density = (12/64) grams per cm^3
density = 0.1875 grams per cm^3
The notation cm^3 is another way of saying "cubic centimeter" as shorthand.
