what is the answer to these please help

Answer: 3.0 g/cm3
Problem 1: You have a rock with a volume of 15cm3 and a mass of 45 g. What is its density? Density is mass divided by volume, so that the density is 45 g divided by 15cm3, which is 3.0 g/cm3
Explanation: The top question answer is 3.00 g/cm3 .... I hope this helps!!! (PLEASE RATE ME AS BRAINLY)