Suppose that a thin metal wire in the shape of a semicircle occupies the curve C, where C' is the top half of the circle x² + y² = 16. The mass density of the wire is described by the function p(x, y) = xy. Find the total mass of the wire. [p(x, y) ds = [p(x(t), y(t)) · √(x'(t))² + (y'(t))²dt hint: mass

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