A monopolist's total cost is TC = 4.5Q, where Q is output. Demand is Q = 10 - P , where P is price. When the monopolist chooses the profit maximizing Q*, the profit earned is
A monopolist's total cost is TC = 4.5Q, where Q is output. Demand is Q = 10 - P , where P is price. When the monopolist chooses the profit maximizing Q*, the profit earned is