Hi
N(x)=-0.3x^2+6.6x+14
Note: vertex form of a parabola,where(h,k) is the vertex
N(x)= -0.3[(x-11)^2 -121]+14
N(x)= -0.3(x-11)^2 + 50.3 Vertex(11,50.3)
ticket sales peak on 11th day and 50 tickets will be sold that day
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