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 one year ago
The cost of manufacturing x items is given by C(x) = 0.02x^2 + 20x + 1800. Find the marginal cost function. Compuare the marginal cost at x = 20 to the actual cost of producing the 20th item.
 one year ago
The cost of manufacturing x items is given by C(x) = 0.02x^2 + 20x + 1800. Find the marginal cost function. Compuare the marginal cost at x = 20 to the actual cost of producing the 20th item.

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onegirl
 one year ago
Best ResponseYou've already chosen the best response.0This is what i did but my teacher says it wrong. C(x) = 0.02x^2 + 20x + 1800 C’(x) = 0.04x + 20 C’(20) = 0.04(20) + 20 = 20.8 so this will be the marginal cost at x = 20 Acutal cost of the 20th item : c(20)  c(19) = 0.02(20^2) + 20(20) + 1800 – 0.02(19)^2 + 20(19) + 1800 = 4380.78

Numb3r1
 one year ago
Best ResponseYou've already chosen the best response.0You should have had everything in the actual cost calculation after the minus in parenthesis. Redo the calculation taking that into account.

onegirl
 one year ago
Best ResponseYou've already chosen the best response.0huh? i dont understand
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