Henry wants to get a job this summer. he can either mow lawns or work in the local library. what is the opportunity cost if he decides to mow lawns?
a. the librarian employing another person
b. the chance to earn by working in a library
c. the chance to earn by mowing lawns

Aflute is on sale for 20% off. including the discount and 8% tax, the sales price is $216.

(! ) three cylinders have a height of 8 cm. cylinder 1 has a radius of 1 cm. cylinder 2 has a radius of 2 cm. cylinder 3 has a radius of 3 cm. find the volume of each cylinder

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?