We know density = Mass / Volume
So Volume = Mass/Density
Volume = Area * Thickness
[tex]Area = 50 ft^2 = 4.645152 m^2\\ \\Mass = 7 oz = 0.198447 kg\\ \\Density = 2.70 g/cm^3 = 2700 kg/m^3\\ \\Substituting \\ \\4.645152 *t = \frac{0.198447}{2700} \\ \\t = 1.58*10^{-5}m = 1.58*10^{-2}mm[/tex]
So the approximate thickness of the foil in millimeters = [tex]1.58*10^{-2}mm[/tex]
