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"centi" is 100. 1 centigram is 100 grams, so Denise's sample is 68,400 centigrams. 68400 - 29510 = 38890 centigrams or 388.90 grams.
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A higher percentage of daughter isotopes present in a sample, the older the rock is.
what is the formual for Density? (mass of object diveded by its volume) What is the desity of Rock sample A? (690 g / 333 cm3 = 2 g/cm3) What is the desity of Rock sample B? (506 g / 506 cm3 = 1 g/cm3) Therefore...Rock sample A is denser than Rock sample B !! Or is it?...