If a ball is thrown directly upward with a velocity of 36 feet per second, its height (in feet) after t seconds is given by y = 36t - 16t2. What is the maximum height attained by the ball?
Your answer is feet

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?