#8

8. The cost (in dollars) of producing x units of a product is given by C =3.6vx +500. Find the approximate change in cost when production increases from 9 to 10 units. 9. The profit derived from selling x units of an item is given by P=-0.25x2 + 2000x -1, 250,000. Find the marginal profit for a production level of 3,000 units