A CD is shaped like a circle wit a diameter of 12 cm. to the nearest centimeter what is the circumference of the CD

How do i solve using pythagorean theorem?

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?