Solve the problem.A box with an open top is formed by cutting squares out of the corners of a rectangular piece of cardboard and then folding up the sides. If x represents the length of the side of the square cut from each corner, and if the original piece of cardboard is 10 inches by 7 inches, what size square must be cut if the volume of the box is to be 40 cubic inches? 
A. 5 in. by 5 in. square
B. 2 in. by 2 in. square
C. 1 in. by 1 in. square
D. 8 in. by 8 in. square
Answer: C
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Solve the problem.Elizabeth measured the height of her tomato plant at 28.99 cm. Two weeks later she measured it again and found that it was 37 cm. How much did the plant grow during the two weeks?
A. 8.11 cm B. 9.01 cm C. 65.99 cm D. 8.01 cm
Solve the problem.The number of acres in a landfill is given by the function 
where t is measured in years. How many acres will the landfill have after 5 years? (Round to the nearest acre.)
A. 6516 B. 3660 C. 2830 D. 2643
A zoo veterinarian can purchase animal food of 4 different types, A, B, C, and D. Each food comes in the same size bag, and the number of grams of each of three nutrients in each bag are summarized in the following table. Use this information to answer the questions that follow. Food
For one animal, she determines that she needs to combine these bags to get 9000 g of N1, 19,000 g of N2, and 17,000 g of N3. Use the matrix operations on a graphing calculator to determine how many bags of each type of food should she order.
What will be an ideal response?
Find the opposite of the polynomial.-5x7
A. -5x7 B. -5x-7 C. 7x-5 D. 5x7