The length of any differentiable curve y = f(x) over [a, b] is given by | V1 + [f'(x)]2 dx. a The portion of a circle that is in the first quadrant is given by f(x) = 49 - x for OSX$7. b a) Approximate the length of this curve, | 1/1+ [f'(x)]2 dx, by finding Me. a b) Use a geometric formula to find the exact length of the curve. a) Me is (Round to three decimal places as needed.)