A radioactive isotope has a half-life of 10 days. If today there are 1 – McqOptions

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1.	A radioactive isotope has a half-life of 10 days. If today there are 125 g of it left, what was its original weight 40 days earlier?
A.	600 g
B.	1000 g
C.	1250 g
D.	2000 g
Answer» E.

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