Mark M. answered 10/21/17
Tutor
4.9
(954)
Retired math prof. Calc 1, 2 and AP Calculus tutoring experience.
Each time the price is decreased by $1, attendance increases by 6000.
Let x = number of $1 decreases
Let R(x) = revenue
= (price per ticket)(number of tickets sold in thousands)
= (9 - x)(28 + 6x)
= -6x2 + 26x + 252
Maximum revenue when R'(x) = 0
-12x + 26 = 0
x = 2.166666 ≈ $2.17
To maximize revenue, the price per ticket should be reduced by $2.17 from the original $9 price.
So, $6.83 is the optimal price.