Final answer:
The volume of the object with a density of 15 g/cm3 and a mass of 480 g is 32 cm³. The density of the object with a volume of 240 cm³ and a mass of 768 g is 3.2 g/cm³.
Step-by-step explanation:
To find the volume of an object, we can use the formula:
Volume = Mass / Density
For the first object, which has a mass of 480 g and a density of 15 g/cm³, we can substitute these values into the formula:
Volume = 480 g / 15 g/cm³
Volume = 32 cm³
For the second object, which has a volume of 240 cm³ and a mass of 768 g, we can rearrange the formula:
Density = Mass / Volume
Substituting the values:
Density = 768 g / 240 cm³
Density = 3.2 g/cm³