Mathematics, 23.11.2020 03:00 smartowl101

URGENT PLS HELP!! If 14 g of radioactive substance are present initially and 8 yr later only 7 g remain , how much of the substance will be present after 19 yr?

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URGENT PLS HELP!! If 14 g of radioactive substance are present initially and 8 yr later only 7 g re...

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