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if a sample that is 4860 years old has 50 radium atoms remaining, how many atoms were in the original sample?
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if a sample that is 4860 years old has 50 radium atoms remaining, how many atoms were in the original sample?

User Paul Ardeleanu
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243000, take the 4,860 and times it by 50
User ANKIT DETROJA
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User Amolbk
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A₁ = 20, r=-3, n = 6 Oa. 4860 Ob. -4860 Oc. -300 Od. -360 Find An for each geometric sequence
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