For items numbers 7, 8, 9, and 10 Problem: A wire of length 18cm is to be bent to form the largest possible rectangle. What is the area of the rectangle? Let x and y be the dimensions of the rectangle. 7. Which of the following is the constraint equation? A. A = xy C. A = xty B. P = x2+ y2 D. P = 2x + 2y8. What is the maximum area of the rectangle? A. 12 cm2 C. 20.25 cm2 B. 9 cm2 D. 9.25 (31m2 9. What is the maximum area of the rectangle? A. 12 cm2 c. 20.25 cm2 B. 9 cm2 D. 9.25 cm2 12. Given a polynomial function f(x) with a degree of n, which of the following is true? A. f(n)(x) = 0 C.f("'1)(x) = 0 B. f(n+1)(x) = 0 D. 10(3)\") = 0 11. If you are to solve for f() of the function f" = 5 sin x - cosx, how many successive differentiations will you have? A. 5 C. 3 B. 4 D. 2