Problema Solution
A company finds that its profits can be modelled with the formula P=67.2x -4.2x^2, whee P is the profit in millions of dollars and x is the production( in thousands of units). At what profit level is the model valid? Hint: Look at the Discriminant.
Answer provided by our tutors
The production x>=0
So
P=67.2x -4.2x^2 = -4.2(x-8)^2 + 268.8
So when x>=0, P