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?

Algebra I  Henry, Thursday, March 24, 2011 at 3:57pm
Y = 45*2.7  0.0425*32,
Y = 121.5  1.36 = 120.14
Make sure the given Eq is correct.