What is 2- 0.945? pls i can't answer this for my home work pls asap

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

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?

Can someone show me step by step how to do this?