Two identical wooden cubes are glued together side-by-side. To find the surface area that needs to be painted, which faces must be excluded from the total surface area of the two separate cubes?

The top and bottom faces of the new shape

The two faces where the cubes are glued together

Only the bottom face of the new shape

A warehouse manager calculates $10 \text{ ft} \times 8 \text{ ft} \times 5 \text{ ft} = 400 \text{ cubic ft}$ for a large shipping crate. What does this calculation represent?

The amount of material needed to build the crate.

The amount of space the crate will take up.

The length of the crate's longest diagonal.

The perimeter of the crate's base.