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Find the exact area of the surface obtained by rotating the curve about the x-axis.
y = sqrt(1 + 3x) , 1 ≤ x ≤ 3? Is it possible for the order of a reactant to be a fraction? How can this occur? What are two mechanisms the body uses to cool itself? The sum of the first 7 terms of an AP is 63 and the sum of its next 7 term is 161. find the 28th term of this? Why do humans have cannabinoid receptors in the brain?