you own a small airplane that holds a maximum of 20 passengeers. it cost you $100 per flight for St. Thomas to St. Croix for gas and wages plus and additional $6 per passenger for the extra gas required by weight. the charge per passenger is $30 each if 10 people charter your plane (10 is the minimum number you will fly), and this charge is reduced by $1 per passenger for each passenger over 10 who travels (that is, if 11 fly they each pay $29, if 12 fly they pay $28, etc.). what number of passengers on the flight will maximize your profit

Applied Maximums and Minimums 

23. you own a small airplane that holds a maximum of 20 passengeers. it cost you $100 per flight for St. Thomas to St. Croix for gas and wages plus and additional $6 per passenger for the extra gas required by weight. the charge per passenger is $30 each if 10 people charter your plane (10 is the minimum number you will fly), and this charge is reduced by $1 per passenger for each passenger over 10 who travels (that is, if 11 fly they each pay $29, if 12 fly they pay $28, etc.). what number of passengers on the flight will maximize your profit