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In order to find the density of an unknown material Susan measured the mass of a cube made out of this material and the length of its side. She recorded the following results: mass, m = 63.7 +/? 0.2 g height = width = depth = d = 3.28 +/? 0.05 cm Applying the rules for error propagation and manipulation of significant figures calculate the density of the unknown material.

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