Math question: Find all the roots of the equation x^3 - 7x^2 + 14x - 8 = 0.
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Math question for Problem Solving & Data Analysis:The population of a city increased by 20% in the last decade. If the current population is 500,000, what was the population 10 years ago?
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What is the median of a data set with 7 elements when the lower median is 12 and the upper median is 18?