MAT 0460 PREP FOR POLYNOMIAL RATIONAL FUNCTIONS 1. Find the zeros and the degree of the polynomial functions. Zeros are also known as x-intercepts. Set each factor equal to zero to solve for x. a) f(x) = (x-1)2(x+ 3)(x -4) b) f (x) =-2x2(x+ 1) 2. Find the zeros and the degree of the polynomial functions. Factor and set each factor equal to zero to solve for x. a) f(x) = x2 + 4x -21 b) f (x) = x* -9x2 3. Factor the following polynomial functions by grouping. The find the zeros of the polynomial functions. a) f (x) = x3+4x2 +8x+32 b) f (x) = 16x3+8x2 -6.x -3 4. The revenue for Costco Wholesale Corporation (in millions of dollars) can be approximated by the function R(x) = .141x3- 3.11x2 + 26.98x - 19.99, where x = 4 corresponds to the year 2004. (Data from Morningstar.com) a) Find and interpret the following: R(5); R(7); R(12) b) Is the revenue always increasing in this model? The cost function for Target Corporation (in billions of dollars) can be approximated by the function C(x) = 0697x4 - 2.296x3 + 26.947x2 - 129.49x + 261.86, where x = 4 corresponds to year 2004. (Data from: www.morningstar.com). a) Find and interpret the following: C(6); C(9); C(11). b) Is the cost always increasing in this model