help with half lives to calculate age of rock

help with half lives to calculate age of rock

Answers
Can you expand the question at all lumpy?
theo.cushion
04 April 2011
yes the questions involves me working out the age of a zircon crystal from the values 207Pb/ 235U ratio of 0.55 I also have a graph of the daughter to parent ratio D/P against the no of half lives but just getting myself in a bit of a muddle.
lumpy
04 April 2011
*number
lumpy
04 April 2011
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