kyao3393
20.04.2020 •
Mathematics
A certain element has a half life of 3,5 billion years. you determine that 5% of the original element remains. the other95% decayed into lead. how old is the rock
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Ответ:
Step-by-step explanation:
Top question
150000-(150000*.15Take 150000*.15 and get 22500, Then 150000-22500=127500
Question two
A- 3000Take 1/3*9000=3000
B-60009000-(9000*1/3)