Question

Iron-59 has a half-life of 45.1 days. How old is an iron nail if the Fe-59 content is 25% that of a new sample of iron? Please show the calculating so I can learn to do it.
See your post above.
i need help with this

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Iron -59 has a half -life of 45.1 days. How old is an iron nail if the Fe-59 content is 25% that of... Iron-59 has a half-life of 45.1 days. How old is an iron nail if the Fe-59 content is 25% that of a... Iron -59 has a half life of 45.1 days. How old is an iron nail if the Fe-59 content is 25% that a ne...