What is the median of a data set consisting of 7, 9, 12, 15, 18?
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What is the limit of (2x^2 - 3x + 5)/(5x^2 - x + 1) as x approaches infinity?
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Math question: In triangle ABC, angle A measures 60 degrees and angle B measures 80 degrees. If the angle bisector of angle C intersects AB at point D, what is the measure of angle ADC?