Math question: What is the value of 'a' in the parabola function 𝑦 = ax^2 if the vertex of the parabola is (2,6) and it passes through the point (4,12)?
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Math question: Solve for x: log(x + 3) = 2
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What is the standard deviation of a data set with values 8, 12, 15, 16, 18?