Question

You are a scientist working on geological dig. You discover a rock layer that contains 50 grams of a substance known to have a half life of 50,000 years. 50% of the substance is parent material and 50% of the substance is daughter material. How old is the rock layer in which you found this substance?

Answer 1

All you do is divide 50,000 from 50%
which is 25000

To do that on calculator just divide 50,000 by 2