Airline Ticket Price A charter airline finds that on itsSaturday flights from Philadelphia to London all 120 seatswill be sold if the ticket price is $200. However, for each$3 increase in ticket price, the number of seats sold decreasesby one.(a) Find a formula for the number of seats sold if the ticketprice is P dollars.(b) Over a certain period the number of seats sold for thisflight ranged between 90 and 115. What was the corresponding range of ticket prices?

Question

Airline Ticket Price A charter airline finds that on its
Saturday flights from Philadelphia to London all 120 seats
will be sold if the ticket price is $200. However, for each
$3 increase in ticket price, the number of seats sold decreases
by one.
(a) Find a formula for the number of seats sold if the ticket
price is P dollars.
(b) Over a certain period the number of seats sold for this
flight ranged between 90 and 115. What was the corresponding range of ticket prices?

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