I have a sheet of aluminum that has a mass of 0.69g, length of 10.2cm and width of 7.5cm. I need to find the volume in cm3 and the thickness in cm. What is the formula to do this? The density of aluminum is 2.699 g/cm3....do I need to use that in the formula or is that irrelevant when calculating volume and thickness? I am returning to school after 6 years and am confused beyond belief so any help will be greatly appreciated.