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April 24, 2015

Homework Help: math/chem significant figures

Posted by kelie on Sunday, September 18, 2011 at 7:34pm.

Which of the answers for the following conversions contains the correct number of significant figures?

A)2.543 m x 39.4in/1m=100.1924in
B)2 L x 1.06qt/1L=2.12 qt
C)24.95 min x 1hr/60 min=0.4158 hr
D)12.0 ft x 12in/1ft x 2.54cm/1in=370cm
E)24.0 kg x 1lb/2.20kg=11lb

the answer is c but i dont understand why. i thought you round the answer based on the number of sig figs of the lowest measurement so why wouldn't D be the answer?

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