What are the characteristics of the circle defined by the equation x^2 + y^2 = r^2? How does the radius r relate to the distance of any point (x, y) on the circle from the origin?
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What is the scalar product of vector u = (3, 4) and v = (-2, 5)?
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What is the result when the exponent rule (a^m)^n is applied with a = 2, m = 3, and n = 4?