The radioactive element polonium decays according to the law where is the initial amount and the time t is measured in days. If the amount of polonium left after 560 days is 40 mg, what was the initial amount present?
A) The initial amount was 642 mg
B) The initial amount was 640 mg
C) The initial amount was 635 mg
D) The initial amount was 629 mg

Question

The radioactive element polonium decays according to the law  where  is the initial amount and the time t is measured in days. If the amount of polonium left after 560 days is 40 mg, what was the initial amount present?
A) The initial amount was 642 mg 
B) The initial amount was 640 mg 
C) The initial amount was 635 mg 
D) The initial amount was 629 mg

Quizplus · Accepted Answer

The Answer of The radioactive element polonium decays according to the law  where  is the initial amount and the time t is measured in days. If the amount of polonium left after 560 days is 40 mg, what was the initial amount present?
A) The initial amount was 642 mg 
B) The initial amount was 640 mg 
C) The initial amount was 635 mg 
D) The initial amount was 629 mg

The Radioactive Element Polonium Decays According to the Law