Posted by Gallaudet on .
A manufacturer determines that the profit in dollars for manufacturing n units is P=2n^260x400. (Assume that n is a positive integer) How many units are produced when the profit is $400?

College Algebra 
bobpursley,
400=2n^260n400
solve the quadratic for n.
I will be happy to critique your thinking. Hint: n cannot be negative.