Time remaining:
ANSWER BOTH. and ignore the answer i put for number 13.

Science
Tutor: None Selected Time limit: 0 Hours

Feb 20th, 2015

Answer: Over time,  carbon- 14 becomes nitrogen

Explanation.  Carbon 14 decays to form nitrogen.

Feb 20th, 2015

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Feb 20th, 2015
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Feb 20th, 2015
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