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− | Think about the problem similar to the half-life problem. | + | Think about the problem similar to the half-life problem, but instead of one half, we have 9/10. |
− | <math>A=A_{0}(9/10)^t</math> | + | <math>A(t)=A_{0}(9/10)^t</math> |
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+ | Then, solve for when A(t)/A_{0} is 1/5. | ||
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+ | Sorry for the confusion I caused in class about this problem. | ||
+ | |||
+ | Your TA, | ||
+ | |||
+ | -Dat Tran |
Revision as of 09:26, 2 October 2008
Think about the problem similar to the half-life problem, but instead of one half, we have 9/10.
$ A(t)=A_{0}(9/10)^t $
Then, solve for when A(t)/A_{0} is 1/5.
Sorry for the confusion I caused in class about this problem.
Your TA,
-Dat Tran