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The surface area of a cube can be found by adding up the area of all six sides.
Since each side of the cube is a square, the area of one side is 3.5 inches squared (3.5 in x 3.5 in = 12.25 sq in).
Because there are six sides on a cube, you would then multiply the area of one side by six to get the total surface area of the cube:
12.25 sq in x 6 = 73.5 sq in
Therefore, the surface area of the cube is 73.5 square inches.