NotgoodATMath7164 NotgoodATMath7164
  • 11-01-2024
  • Mathematics
contestada

The half-life of an isotope is 10,000 years. If 12.5% of the parent isotope remains in the rock by the
time it is dated, how old is the rock?
A 40,000 years
B 10,000 years
C 30,000 years
D 20,000 years

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