Answer:
Rest of question:
... equals marginal cost.
Firms will maximize profits at the point where marginal revenue equals marginal cost because producing after this point means that no profits will be made.
As long as the Marginal revenue exceeds marginal cost, there will be profits made because the company is making more than it is spending so they should keep producing. When it gets to a point in production where the marginal revenue equals marginal cost, the company should not produce further than that.
This is because, as earlier mentioned, any further production would result in the marginal cost being larger than the marginal revenue which means that a loss will be made. The company should therefore stop at the point where MR = MC so as not to let MC get larger than MR so that no losses will be made.