Find the equation to solve the surface area obtained by revolving the parabola x? = 4y from x = -2 to x = 2 about the x-axis. r2 x2 A. S = f°,* V4 + x² dx -2 4 r2 nx? B. S = [," V4+ x² dx -2 2 x2 C. S = f, 2ny 1+ dy D. S = , 2ny/1 + 4y dx 4

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