Mathematics, 05.02.2020 12:42, mazielynn84

Aradioactive substance has a half-life of 5 million years. what is the age of a rock in which 25% of the original radioactive atoms remain?
choose one answer.
a. 2.5 million years
b. 5 million years
c. 15 million years
d. 10 million years

Answers: 3

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Aradioactive substance has a half-life of 5 million years. what is the age of a rock in which 25% of...