A monopolist maximizes profit by producing the quantity of output where marginal cost equals which of the following?

A monopolist maximizes profit by producing the quantity of output where marginal cost equals marginal revenue. Marginal cost is the cost of producing one more unit of a good, while marginal revenue is the extra income gained from selling that additional unit. When these two values are equal, the monopolist knows they are making the most profit because producing more would cost more than the revenue gained. For example, if a company makes bicycles and finds that producing the 100th bike costs $200, and selling it brings in $200, they are at the optimal point. Producing one more bike would increase costs without increasing profit, so the monopolist will stop at that point.