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44g of petrified wood was found in a petrified forest. A sample showed a carbon-14 activity...

44g of petrified wood was found in a petrified forest. A sample showed a carbon-14 activity of 100 decays/minutes. How long has the tree been dead (in years)? (The half-life of carbon-14 is 5730 years and freshly cut wood has a carbon-14 activity of 14.96 decays/min per gram.)

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Answer #1

SOLUTION::

we know that

  

from carbon freshly cut wood has a carbon-14 activity of 14.96 decays/min per gram.

now,

The 15574 years approx 15600 years  long has the tree been dead

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