Posted by **Sarah** on Tuesday, March 22, 2011 at 1:59pm.

A sample of radioactive material weighing 45 grams has a decay rate of 4.25% each day. The equation y = 45(2.7)–0.0425t can be used to find the amount of material that still remains, where t is the number of days that have passed. Approximately what is the amount of material that still remains after 32 days?

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