Question 398189
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Hi
P(x) = -0.4x^2 + fx - m where f is set up fee, m the hanger charge 
& x is # of flights excursions facilitated in that month
a) If $40 is charged for a set up fee, and the monthly hanger rental is $800
P(x) = -0.4x^2 + $40x - $800
b) How much is the profit when 30 flight excursions are sold in a month
P(30) = -0.4(30)^2 + $40(30) - $800  = $40