Question

The monthly cost in dollars from producing x units of an item is given by the cost function C(x)=2x^2-160x+18400. How many units will result in the minimum cost?

I do not know how to start this problem. Thank you for your help!

Answer 1

this just a parabola. You know that for

ax^2+bx+c, the vertex (minimum) is at x = -b/2a.

so, plug in your values of a and b to find the desired x.

Answer 2

89