Question: Find the 3rd derivative of f(x) = 2x^3 + 5x^2 + 9x - 1.
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What is the radian measure of the angle formed by a segment from the center of the unit circle to a point on the circumference that is 1/4 of the way around the circle counterclockwise?
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Math Question: Convert the number 6,800,000 to scientific notation.