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OpenStudy (anonymous):
A substance has a half-life of 10,000 years and an initial mass of 1,000 grams. How many years will pass before only 250 grams of the substance's parent material is left? A. 20,000 B. 25,000 C. 30,000 D. 40,000
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OpenStudy (anonymous):
Can you help me please? @PRAETORIAN.10
OpenStudy (praetorian.10):
of course i can mate, sorry to keep you waiting i was combing my hero hair xD
OpenStudy (praetorian.10):
C. 30,000
OpenStudy (praetorian.10):
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