Solve.The function A = A0e-0.01155x 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 500 pounds of the material are placed in the vault, how much time will need to pass for only 79 pounds to remain?

A. 165 years
B. 320 years
C. 160 years
D. 170 years


Answer: C

Mathematics

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Mathematics