A newsletter has a maximum audience of 80 subscribers. The publisher estimates that she will lose 1 reader for each dollar she charges. Therefore, if she charges x dollars, her readership will be (80 - X). (a) Multiply this readership by x (the price) to find her total revenue. Multiply out the resulting quadratic function. f ( x ) = (b) What price should she charge to maximize her revenue? (Hint: Find the value of x that maximizes this quadratic function.) $ Need Help? Read It Watch It