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December 21, 2014

December 21, 2014

Posted by **Liz** on Tuesday, May 15, 2012 at 9:33pm.

If the cost of a cell phone has decreased 400% during the past 10 years, does that correspond to a cost decrease of four times? Make up your own numbers in an example and then explain your answer as though you were talking to someone who has never taken algebra

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