What is the measure in degrees of an isosceles triangle if its base angle is 50°?
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What is the integral of f(x) = 3x^2 - 6x + 2 with respect to x over the interval [0, 4]?
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What is the average age of students in a class with 25 students, if the ages are 18, 20, 21, 18, 19, 22, 20, 19, 17, 21, 18, 20, 19, 22, 21, 20, 19, 17, 19, 20, 21, 19, 18, 20, 19?