Homework Help: algebra

Posted by can some please help me with this one on Wednesday, July 27, 2011 at 12:23pm.

An artifact was found and tested for its carbon-14 content. If 79% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

algebra - Reiny, Wednesday, July 27, 2011 at 12:32pm
http://www.jiskha.com/display.cgi?id=1311445673
algebra - lorena, Thursday, July 28, 2011 at 11:03pm
Planet A has an average surface temperature of _170%. Planet B has an avergage surface temperature that is 5/5 times that of Planet A. Find the avergae surface temerature on planet B.
algebra - lorena, Thursday, July 28, 2011 at 11:04pm
Planet A has an average surface temperature of _170%. Planet B has an avergage surface temperature that is 5/5 times that of Planet A. Find the avergae surface temerature on planet B.

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