Question 443709
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Hi
N(x)=-0.3x^2+6.6x+14
Note: vertex form of a parabola, {{{y=a(x-h)^2 +k}}} 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
{{{drawing(300,300,   -100,100,-100,100,grid(1),
circle(11,50.3,1.5),
graph( 300, 300, -100,100,-100,100,0,-.3x^2+6.6x+14
)))}}}
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