Fermium-257 has a half-life of 100 days. A sample has a mass

Last updated: 7/19/2022

Fermium-257 has a half-life of 100 days. A sample has a mass of 60 mg initially. I) What is the formula for finding the amount remaining after t days. II) When will there only be 5 mg remaining? A) y = 60(2) -t 100; 248 days B) y = 60 e -t 100; 248 days C) y = 60(2) -t 100; 358 days D) y = 60e -t 100; 358 days