Finnd the total area of a cube with an edge of 9.

Since area is in square units rather than cube units, I'm going to assume this is the surface area, not the volume.

Each edge = 9, so each side has an area of 81 units². Since a cube has 6 sides, the overall area is (side area) times 6. \(81 \times 6 = 486\) units², so the answer is b.