There are 18 books on the summer reading list. in how many different ways can you choose one per week for 8 weeks?
algebra b chapter 12 section 6
is it permutation notation or combination notation

Anew landowner is interested in constructing a fence around the perimeter of her property. her property is 1,080√30 feet wide and 500√20 feet long. what is the perimeter of the property? (recall that the perimeter is the sum of each side of a shape or boundary). a 1,580√40 feet b. 5,320√5 feet c. 3,160√20 feet d. 10,640√5 feet