SOLUTION: Can someone please step me through the following question? A radioactive material decays according to the formula A = A0(2)-t. How much of a 5 gram sample will be left in 3 year

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Question 324774: Can someone please step me through the following question?
A radioactive material decays according to the formula A = A0(2)-t. How much of a 5 gram sample will be left in 3 years?
Thank you,
Alberto
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Did you mean,
A%28t%29=A0%2A2%5E%28-t%29
A0=5
t=3
A%283%29=5%2A2%5E%28-3%29
A%283%29=5%2A%281%2F8%29
A%283%29=5%2F8
.
.
.
5/8 gram is left.