Help solve A-C.

(9) Alison's Airline sells airline tickets for $300 each and every day sells 800 tickets at this price. It costs the airline $120 to lly each passenger. Market research shows that for every $10 the price is lowered an extra 20 passengers will fly each day, and for every $10) the price is increased 20 fewer passenger will fly each day. (a) If the price of the ticket is changed to be S(800 - 10r) how many passengers fly each day ? Do not use any parentheses. number passengers (b) How much total profit does the airline make on ticket sales each day in the situation described (a). Answer involves s. The answer is was + by I c. Fill in o. be in the spaces provided. profit = S (c) What price should the tickets be sold at so Alison's Airline makes the most profit ? answer is a number like 23 price