Physics, Chemistry and Biology: Post your doubts here!

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the total we r gvn is 52 , first divide it by 2 = 26
go on the graph nw n look for 26 on y axis , n thn go to the mark at x axis , dats the half life
Actually when i see the x axis for 26 then the ans comes out to be 2.6 days , which is not the answer. :oops: Do see the marking scheme. it might give you some idea. I am still unable to do it
Maybe u forgot to deduct the background radiation. Idk ! frm where to deduct the background radiation. o_O
 
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