City of first class and city of second class. what distinguishes the designations

Acamper leaves camp on a kayak and travels 50 miles east on a river, then he ties his kayak to the bank and travels 20 miles north on a bicycle. this trip can be plotted on the coordinate plane, where the camp is the point (0, 0). the distant of the camper to the camp can be found using the distance formula. which other formula can he use? a) 502 - 202 b) 502 + 202 c) 502 - 202 d) 502 + 202

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?

At a book fair, joe bought 24 books at 3 for $5 and had $2 left. how much money did he have at first?