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Find the curve's unit tangent vector. Also, find the length of the indicated portion of the curve. r(t) = 6ti + 21 j - 30k

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Find the curve's unit tangent vector. Also, find the length of the indicated portion of the curve. r(t) = 6ti + 21 j - 30"k 1sts2 The curve's unit tangent vector is + k (Type an integer or a simplified fraction.) The length of the indicated portion of the curve is units. (Simplify your answer.)

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