Asked by Student101
                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?   Show all calculations leading to a solution. I am really confused on how to find t here? Can someone help? I can set up the rest of the equation 
            
            
        Answers
                    Answered by
            DrBob222
            
    Didn't I do this a couple days ago for you. Instead of reposting, tell me what you didn't understand about the answer and we can get through it. t is the only unknown in the equation.
    
                    Answered by
            DrBob222
            
    http://www.jiskha.com/display.cgi?id=1431110694
    
                    Answered by
            Student101
            
    I have never had this done for me? I am still confused on how to find t?
    
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