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The region in the first quadrant bounded by the graphs of y = x and is rotated around the line y = x. Find
(a) the centroid of the region and
(b) the volume of the solid of revolution.
y= x^2/2
Find the length of the graph of
y=1/3(x^3/2-x^1/2
from
(1,-2/3)
to
(4,2/3)

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