Solving proportion 10\8=n\10

Acircle has a circumference of 28.36 units what is the diameter of the circle

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?

East black horse $0.25 total budget is $555 it'll cost $115 for other supplies about how many flyers do you think we can buy