Final answer:
The density of the cube is 2 g/cm³.
Step-by-step explanation:
The density of a substance can be calculated by dividing its mass by its volume. In this case, we have a solid cube with a mass of 748 grams and dimensions of 7.2 cm x 7.2 cm x 7.2 cm. To find the volume of the cube, we need to calculate the product of its three dimensions, which is 7.2 cm x 7.2 cm x 7.2 cm = 373.248 cm³. Now we can divide the mass of the cube (748 grams) by its volume (373.248 cm³) to find the density:
Density = Mass / Volume
Density = 748 g / 373.248 cm³ = 2 g/cm³