I believe the answer is b
Answer:
4n - 13
Step-by-step explanation:
There's a +4 between each number in the sequence.
4n
The previous number before the first given (-9) is -13.
4n - 13
Consider the attached figure. The central square is the "floor" of the box, and it is a (x-2)-by-(x-2) square.
The four rectangles of the side will be the "walls" of the box, and they are (x-2)-by-2 rectangles.
The volume is given by the base area multiplied by the height of the walls, so we have
