Find the SA of a cube with an edge of 21.8cm. Explain how you got your answer.
Each face of the cube is a square with a surface area of [21.8 cm]^2 = 475.24 cm^2
And since a cube has 6 faces.......the total surface area = 6 * 475.24 cm^2 = 2851.44 cm^2
+4 
