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OpenStudy (anonymous):
Suppose you have 50 grams of a radioactive isotope with a half-life of 2 years. How much of the isotope will you have after 4 years? A) 50 B) 25 C) 12.5
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jimthompson5910 (jim_thompson5910):
"a half-life of 2 years" means that after 2 years, the original amount will decay to half the original amount ex: if you have 100 grams, then after 2 years, it will decay to 50 grams
OpenStudy (anonymous):
thank you for explaining that to me :) now i actually understand the question!
jimthompson5910 (jim_thompson5910):
you're welcome, I'm glad it's making sense now
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