The function A = Age -0.00866x models the amount in pounds

Last updated: 8/10/2022

The function A = Age -0.00866x 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 200 pounds of the material are placed in the vault, how much time will need to pass for only 65 pounds to remain? Round to nearest whole number. A. 260 years B. 140 years C. 130 years D. 135 years