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anonymous
 one year ago
The cost of producing x widgets is modelled by C(x)=10sqrt(x) + 20, where C is in dollars. a)What is the rate of change of the cost with respect to (wrt) the number of units, x, being produced when the production level is 400 widgets?
anonymous
 one year ago
The cost of producing x widgets is modelled by C(x)=10sqrt(x) + 20, where C is in dollars. a)What is the rate of change of the cost with respect to (wrt) the number of units, x, being produced when the production level is 400 widgets?

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Curry
 one year ago
Best ResponseYou've already chosen the best response.0Begin by taking the derivative of C(x).

Curry
 one year ago
Best ResponseYou've already chosen the best response.0So it'd be something like 5/sqrtx > 5/sqrt 400 = 1/4.

Curry
 one year ago
Best ResponseYou've already chosen the best response.0First derivative always gives rate of change of the value of interest/concern/focus in the problem.
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