What is the scalar product of vector A = (3, -4) and vector B = (-2, 5)?
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What is the average weight of 20 students in a class if their weights are 120, 130, 135, 140, 125, 130, 135, 150, 155, 125, 130, 140, 135, 130, 145, 160, 155, 150, 135, and 140 pounds?
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Math Question: Find the 4th order derivative of f(x) = cos(3x) - sin(5x), with respect to x.