Convert the exponential function to the form indicated. (round all coefficients to four significant digits.) f(x) = 2.5 e^(-0.7 x); f(x)=a b^x a = ? b = ?

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?