Homework Help: math

Posted by anonymous on Saturday, February 12, 2011 at 1:08am.

when no more than 110 units are produced, the cost of producing x units is given by
C(x)=.2x^3 - 25x^2 + 1531x + 25,000

How many units should be produced in order to have the lowest possible average cost?

math - Reiny, Saturday, February 12, 2011 at 9:01am
C '(x) = .6x^2 - 50x + 1531
= 0 for a max/min of C

solve using the quadratic formula
This quadratic has no real roots, I will leave it up to you to interpret that result.
math - Anonymous, Saturday, February 12, 2011 at 2:24pm
may i ask how you came up with this equation? thank you
math - Reiny, Saturday, February 12, 2011 at 3:16pm
I took the derivative.
Is this not from a Calculus course ?
math - Reiny, Saturday, February 12, 2011 at 5:18pm
I took the derivative.
Is this not from a Calculus course ?
math - Anonymous, Saturday, February 12, 2011 at 6:08pm
no its not. its from a business math course.but i think theyre a pretty similar course?

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