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Home Q & A Board Biology-Related Homework Help General Biology
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vietquocnguyen vietquocnguyen
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6 years ago
What is the half-life of the decay of uranium
  238 to lead 206?
 
  a. 2.5 million years.
  b. 220 million years.
  c. 1.2 billion years.
  d. 2.5 billion years.
  e. 4.5 billion years

Question 2

What is the cut off age for dating fossils by
  their Carbon 14 content?
 
  a. 60,000 years
  b. 12,000 years
  c. 6,000 years
  d. 2,000 years
  e. 500 years
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cruzyesica95cruzyesica95
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6 years ago
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6 years ago
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