Question

answer my question....
.......​

Answer 1

Explanation:

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Answer 2

ⒽⓁⓄ ⓜⓐⓣⓔ

here, Ro = 20 decays / min

R = 2 decays / min

T half = 5730 yrs

using, t= T half / 0.6931 ln( 20/2)

= 5730/ 0.6930 × 2.303

= 19039.4 yrs

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