To find the length of one turn of the helix given by r(t) = b (cos) ti + b(sin)j + sqrt(1-b^2) k, t should go from (blank) to (blank)  0 to pi, 0 to 2pi, 0 to 1, or 0 to 2?  Now find the length of one turn of the given helix, is it 1, 4pi, pi, or 2pi?

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