What is the radius, r, of a circle if its equation is given by x^2 + y^2 = 9?
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Math question: Find the limit as x approaches zero of (sin(x) - x)/x^3 using L'Hospital's Rule.
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What is the perimeter of a triangular field if one side measures 20 meters, the second side is twice the length of the first, and the third side is three times the length of the first?