Question

can someone explain to me how to answer this:
Polycarbonate plastic has a density of 1.2 g/c3. A photo frame is constructed from two 3.0 mm sheets of polycarbonate. Each sheet measures 28 cm by 22cm.What is the mass of the photo frame?
Mass = Volume x density
= 28x22x6 cm^3 x 1.2 g/cm^3

The answer will be in grams. Divide it by 1000 for kilograms

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