Kenneth S. answered • 10/19/17

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Let new price be p. Attendance A(p) will be 400 - 20(p-11) = 620 - 20p. p>11

Then revenue R(p) will be = pA(p) = 620p - 20p

^{2}.Study this; do you agree?

Then the revenue function is a parabola and at its vertex the maximum occurs.

vertex occurs when p = -b/(2a) = -620 /(-40) =

**$15.50**