# 4 approximate the length of the curve using n secant

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4. Approximate the length of the curve using n secant lines for n = 2; n = 4.
14. Compute the arc length exactly.
30. Set up the integral for the surface area of the surface of revolution, and approximate the integral with a numerical method.
32. Set up the integral for the surface area of the surface of revolution, and approximate the integral with a numerical method.
36. Set up the integral for the surface area of the surface of revolution, and approximate the integral with a numerical method.