Question: 1. For the cost function, find the marginal cost at the given production level x. State the units of measurement. (All costs are in dollars.)

1. For the cost function, find the marginal cost at the given production level x. State the units of measurement. (All costs are in dollars.) HINT [See Example 1.] C(x) = 15,000 + 10x + 1,000 x; x = 100

2. Find the marginal cost, marginal revenue, and marginal profit functions.

C ( x ) = 5 x 2 ; R ( x ) = x 3 + 7 x + 12


Marginal cost

Marginal revenue

Marginal profit


Find all values of x for which the marginal profit is zero. Interpret your answer. (Enter your answers as a comma-separated list.)

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