If average movie attendance is 250 million when prices are $9 a ticket and 200 million when prices are $11 a ticket, the elasticity of demand for movie tickets is about:

The revenues of a company increased by 39% in year one and decreased 22% in year two. what is the overall change over the two-year period?

Eileen's elegant earrings produces pairs of earrings for its mail order catalogue business. each pair is shipped in a separate box. she rents a small room for $150 a week in the downtown business district that serves as her factory. she can hire workers for $275 a week. there are no implicit costs. what is the marginal product of the second worker?

You were able to purchase two tickets to an upcoming concert for $100 apiece when the concert was first announced three months ago. recently, you saw that stubhub was listing similar seats for $225 apiece. what does it cost you to attend the concert?