Archimedes showed that the area of a parabolic arch is equal to 2/3 the product of the
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Archimedes showed that the area of a parabolic arch is equal to 2/3 the product of the base and the height (see figure).
(a) Graph the parabolic arch bounded by y = 9 - x² and the x-axis. Use an appropriate integral to find the area A.
(b) Find the base and height of the arch and verify Archimedes' formula.
(c) Prove Archimedes' formula for a general parabola.
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