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Use the following information to answer questions 9 and 10. An open box is constructed from a rectangular sheet of cardboard by cutting out squares

Use the following information to answer questions 9 and 10. An open box is constructed from a rectangular sheet of cardboard by cutting out squares from each corner and folding up the sides. The original sheet is 8 cm by 5 cm, and the squares have a side of x cm. 9. The volume I/ expressed as a function of x is A. V=4x -26x2 + 40x B. V =4x -13x2 + 40x C. V =2x3-26x2 + 20x D. V=2x -13x3+20x 10. The maximum volume of the box is A. 9 cm B. 18 cm C. 27 cm D. 36 cm

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