Write a unit rate for the situation) you can buy 20 fluid ounces of shampoo for $4.40 or 24 fluid ounces for $4.80. which is the better buy? explain

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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?