the marginal cost c (in dollars) of manufacturing x cell phones in thousands is given by
C (x) = 5x^2-200x + 4000
A. how many cel phones should be manufactured to minimize the marginal cost ?
B. what is the minimum marginal cost?
the marginal cost c (in dollars) of manufacturing x cell phones in thousands is given by
C (x) = 5x^2-200x + 4000
A. how many cel phones should be manufactured to minimize the marginal cost ?
B. what is the minimum marginal cost?
Differentiate the function,
Set the derivative equal to 0 and solve for x.
Substitute this value of x into your function to get the minimum cost.
If you're not allowed to use a Calculus solution, then complete the square to get the function into turning point form. The turning point is the minimum value.