A person's revenue "R" (in dollars) on the sale of "X" fruitcakes is determined by the formula R = 50x - x squared. Her cost "C" in dollars for producing "X" fruitcakes is given by the formula C = 2x + 40. For what value of "X" is the person's profit positive? (Profit = revenue - cost).
C=2x + 40
Profit = R-C = 50x-x^2-2x-40=48x-x^2-40
Profit = -x^2+48x-40
This is a quadratic equation of the form ax^2+bx+ c
Let us find the value for which this equation ...
Calculates the range of values for which profit is positive.