Math question: Consider a quadratic function y = ax^2 + bx + c. If the vertex of the graph is located at (-3, 5) and the graph opens downward, determine the equation of the quadratic function.
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What is the value of the sine ratio if the opposite side is 5 units and the hypotenuse is 10 units?
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Math question: What is the area of a triangle with base=10 units and height=8 units?