Find the marginal cost, marginal revenue, and marginal profit functions. C(x)=2x; R(x) = 5x - 0.001x2 marginal cost marginal revenue marginal profit Find all values of x for which the marginal profit is zero. (Enter your answers as a comma-separated list.) x = For the cost function, find the marginal cost at the given production level x. State the units of measurement. (All costs are in dollars.) C(x) = 20,000+ 40x + --Select Units---------- 10,000 ; x = 100