SOLUTION: The function A = A0e^(-0.0099x) models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was p

Question 1202994: The function A = A0e^(-0.0099x) models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. How many years will it be until 30% of the original amount remains in the vault? Round off to the nearest year.
Answer by josgarithmetic(39616) (Show Source): You can put this solution on YOUR website!
to make the text symbols easier to manage

According to question, ....., and you want to solve for x.

---------and you can finish computing this...
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