Pls help me I need this real quickly

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

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?

Anyone know these questions? i need ,.