Answer:
The surface area of the box is 541.5 in².
Explanation:
The surface area of a cube is the sum of six congruent squares.
The area of each square is the square of the side length of the cube.
Therefore, the surface area of a cube with side length "s" is:

Therefore, to calculate the surface area of a cube with a side length of 9.5 inches, substitute s = 9.5 into the formula:

Therefore, the surface area of the box with side lengths of 9.5 in is 541.5 in².