Sunday

April 20, 2014

April 20, 2014

Posted by **ashley** on Monday, September 14, 2009 at 10:32pm.

- chemistry -
**DrBob222**, Monday, September 14, 2009 at 10:52pmratio means one divided by the other.

surface area/land area = 1.97*10^8/5.73*10^7

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