The average age of teaching staff in a certain institution is 51.0 years old. Assume that the distribution of ages is normal and has a standard deviation of 8.0 years. If 9 teaching staff are chosen at random for a committee, find the probability that the average age of those teaching staff is less than 52.9 years.

What is the relationship between marginal external cost, marginal social cost, and marginal private cost? a. marginal social cost equals marginal private cost plus marginal external cost. b. marginal private cost plus marginal social cost equals marginal external cost. c. marginal social cost plus marginal external cost equals marginal private cost. d. marginal external cost equals marginal private cost minus marginal social cost. marginal external cost a. is expressed in dollars, so it is not an opportunity cost b. is an opportunity cost borne by someone other than the producer c. is equal to two times the marginal private cost d. is a convenient economics concept that is not real

When you hire an independent contractor you don't have to pay the contractors what

Which of the following statements about cash basis accounting is true? a. it is more complicated than accrual basis accounting. b. the irs allows all types of corporations to use it. c. it follows gaap standards. d. it ensures the company always knows how much cash flow it has.