If 900 pounds of the material are initially put into the vault, how many pounds will be left after 30 years?

Question

16) The function A = A0e -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 900 pounds of the material are initially put into the vault, how many pounds will be left after 30 years? 16) A) 113 pounds B) 714 pounds C) 150 pounds D) 1350 pounds

Answer 1

You have an equation for A with A0 and x in it. Plug in x = 30 years, A0 = 900 pounds, and evaluate the function A.