Gibbs Pritchard

01/08/2023 · Elementary School

17) The function \( A=A_{0} e^{-0.01155 x} \) models the amount of a particular radioactive material stored in a concrete vault, where \( x \) is a number of years since the material was put into the vault. Suppose 400 pounds of the material are initally put into the vault. Ansuer the folloving questions: a) How many pounds will be left after 130 years? (Round to nearest whole number) b) After how many yews will there be 50 pounds remaining? (Round to newest whole number)