In order to get the volume of a rectangular box, the formula would be V = LxWxH. So given that Length L = 2w H = 3-w W = x Let x be the width, so it will look like this. V = (2x)(x-3)(x) Multiply these and we will get 2x^3-6x^2. Therefore, the answer would be option D. Hope this answer helps. Let me know if you need more help next time.