Health, 25.02.2020 16:57 allison9746

PLS HELP 150 POINTS
If you started with a sample that contained 4 grams of strontium-90, how much strontium-90 would be left after 84 years?

3 grams

0.5 gram

2 grams

1 gram

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PLS HELP 150 POINTS
If you started with a sample that contained 4 grams of strontium-90, how m...