Could someone work this problem for me and explain what they did? It's the only one on the worksheet I don't understand... "b. A truckload of 2-liter soda bottles was finely shredded at a recycling center. The plastic shreds were placed into 55-liter drums. What is the mass of the plastic shreds inside one of the drums?" I know that the first number in the problem is going to be 55,000 cm^3, because 55 liters = 55,000 milliliters, which is the equivalent of cm^3. I just don't know what the second number would be. Thanks in advance for the help!