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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.
 11 months ago
 11 months 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.
 11 months ago
 11 months ago

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onegirlBest ResponseYou've already chosen the best response.0
This 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
 11 months ago

Numb3r1Best ResponseYou've already chosen the best response.0
You should have had everything in the actual cost calculation after the minus in parenthesis. Redo the calculation taking that into account.
 11 months ago

onegirlBest ResponseYou've already chosen the best response.0
huh? i dont understand
 11 months ago
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