Question: ? 2 2 5 R a . ( a ) What was the intitial quantiy? Round your answer to three decimal places. b . )

?225Ra.
(a) What was the intitial quantiy? Round your answer to three decimal places.
b.) How mach of the isotope remains after 14000 years? Round your answer to three decimal places.
? 2 2 5 R a . ( a ) What was the intitial

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