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Find the arc: length at the curve below an the given interval. 31'2 3r: g [x2+1] on [3,9] The length of the curve is E. {Type an exact answer, using radicals as needed} Find the area at the surface generated when the given curve is resolved abeut the given axis. 5r = SJ}, for 48 5x534; about the xaxis E) The surface area is D square units. [Type an exact answer, using 1: as needed]