Question: The function A = Age-0.0077x models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the

The function A = Age-0.0077x models the amount in pounds of a

The function A = Age-0.0077x 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. If 600 pounds of the material are placed in the vault, how much time will need to pass for only 204 pounds to remain?

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