A wedding planner determines that one waiter can serve 30 guests, two waiters can serve 70 guests, three waiters can serve 120 guests, four waiters can serve 160 guests, and five waiters can serve 180 guests. The marginal product of the third waiter is guests.

50 guests

Explanation:

Marginal product is the factor of production, which is defined as the change in the output results or consequence from employing one or single unit of a specific unit. It is also acknowledge as the marginal physical productivity.

For example, the change in the output results when the business or the firm increase the labor from 6 to 7. So, 1 would be the marginal product.

So, in this case, the marginal product for the third waiter is 50 guests (120 - 70).

tell them not to name the burger a cheese burger

there was no passage listed but using the process of elimination i'd say it was d. the high economy would do the opposite. i don't see how low prices would affect it. high unemployment is possible but i feel d is the better answer.