A firm produces 4,000 units of output using 500 workers. Marginal cost is $10, the wage rate is $160, and total fixed cost is $100,000. When output is 4,000 units, Group of answer choices average variable cost is increasing. average total cost is increasing. average total cost is decreasing. average variable cost is decreasing.

Helen tells her nephew, bernard, that she will pay him $100 if he will stop smoking for six months. helen was hopeful that if bernard stopped smoking for six months, he would stop altogether. bernard stops smoking for six months but then resumes his smoking. helen will not pay him. she says that the type of promise she made cannot constitute a binding contract and that, furthermore, it was at least implied that he would stop smoking for good. can bernard legally collect $100 from helen