A sample of radioisotope has a decay constant of 9.978✕10-7 s-1 and prepared with an initial activity of 7.5✕1012 s-1. Find the number of atoms in the sample after 10 days.

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A sample of radioisotope has a decay constant of 9.978✕10-7 s-1 and prepared with an initial activity of 7.5✕1012 s-1. Find the number of atoms in the sample after 10 days.

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