9. You need 4 sections of wood, Each one is 3 feet 8 inches long. If the board is only sold by the foot, what's the shorts length of board you can buy?

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?