What is the measure of an exterior angle of a regular polygon with 9 sides?
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Math question: For the parabola function 𝑦 = ax^2, if the vertex is at (3, 4) and one other point on the parabola is (6, 9), can you find the value of 'a'?
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What is the range of the square root function, f(x) = √x, where x is a non-negative real number?