Asked by Kathy
                The halflife of Phosphorus is 14.3 days, if i start with 100g how long will it take so that only 25g will be left?
One month is my answer, I just need confirmation. Thank you
            
        One month is my answer, I just need confirmation. Thank you
Answers
                    Answered by
            bobpursley`
            
    amount left=original*(1/2)^(days/14.3)
25/100=(1/2)^(days/14.3)
(1/2)^2=(1/2)^(days/14.3)
so days=28.6
    
25/100=(1/2)^(days/14.3)
(1/2)^2=(1/2)^(days/14.3)
so days=28.6
                    Answered by
            Kathy
            
    Thank you
    
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