jorge3o5
Carbon-14 has a half-life of approximately 5,730 years. How many half-lives have occurred in a sample that contains 25 percent of the original amount of the parent isotope?
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jorge3o5
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@bobbylynn u know the answer?
jorge3o5
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?
jorge3o5
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ask someone :)
bobbylynn
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ok i did
jorge3o5
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hmu when you got the answer
Jesusfreak2
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The half life of carbon 14 is 5700 years. So If a fossil is 5700 years old then half of the carbon-14 is left. I think this may be it! I tried!
jorge3o5
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so the answer is 2?
Jesusfreak2
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do you have answer choices?
Jesusfreak2
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Oh yeah!
Jesusfreak2
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I think so! Thats my guess!
blues
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OK, Jorge, this is very similar to the math question I asked you to post in mathematics a few moments ago...
Jesusfreak2
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But that is pretty much a biology question. well more like Chemistry
Rogue
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It's more of a chemistry question than math or biology.
1 half life: 100% ---> 50%
2nd half life: 50% ---> 25%
2 half lives.