Please answer these calculus questions

Find the marginal average cost function if cost and revenue are given by 000 = 135 + 8.1x and R(x) = 4x- 0.06x2. The marginal average cost function is (1'(x)= |:|. Find the prot function if cost and revenue are given by C(x) = 153 + 5.2x and R(x) = 9x - 0.07x2. The prot function is P(x) = D. The total cost (in dollars) of producing x food processors is C(x) = 1700 + 90x - 0.6x2. (A) Find the exact cost of producing the 61st food processor. (B) Use the marginal cost to approximate the cost of producing the 61st food processor. (A) The exact cost of producing the 61st food processor is $D