please view the image below and show work for a brainlist :))

Step-by-step explanation:
calculate the difference in level of water : (68.1-52.5)mL = 15.6mL ( volume)
mass of the rock = 27.69g
density = mass/volume
=> (ρ) = 27.69/15.6 = 1.775g/mL or 1.775g/cm³(1cm³=1mL).
hope this helps you.