What is the unit vector in the direction of vector v = (-2, 5)?
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Find the amplitude of the function f(x) = 3sin(2x) + 4cos(5x) when x ranges from 0 to 2π.
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Question: The dataset {5, 8, 8, 9, 10, 11, 11, 11, 15, 18} represents the number of cookies eaten by children in a week. Calculate the mode, median, range, and average of cookies eaten.