41. Evaluate the line integral over the given curve C. (9x + 3y)ds; r(t) = (t - 9)i + tj, 0 ≤ t ≤ 4. C a. -48 b. 96 c. 420-√2 d.-228√2

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A: Consider the equation of the circle The graph can be plotted for the circle as

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Q: 2. Find the exact length of the curve y = 16 2x² on the interval 2 ≤ x ≤ 3.

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A: