A political party orders an arch for the entrance to the ground in which the annual convention is being held. The profile of the arch follows the equation $y=2x-0.1x^{2}$ where $y$ is the height of the arch in meters. The maximum possible height of the arch is
y=2x - 0.1x^2 it's basically an equation of parabola
(x-10)^2 = - 10(y-10) // it's form of x^2= -4ay graph will go downward :-
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1 full-length test and revision...