What is the average temperature (in degrees Celsius) of a city for the past 30 days if the daily temperatures were 25°C, 30°C, 28°C, 23°C, 26°C, and 24°C?
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What is the standard deviation of a dataset, given the mean, number of data points, and individual values?
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Math question: Find the derivative of f(x) = 3x^4 - 2x^3 + 7x^2 - 8x + 12.