calculate-the-time-it-will-take-for-the-amount-of-niobium-92-to-reach-25-0-of-it

Question

Calculate the time it will take for the amount of Niobium-92 to reach 25.0% of its initial amount. The half-life of Nb-92 is 34.7 million years.

Accepted Answer

6.94×$$10^{7}$$ years

Answer

1.44×$$10^{7}$$ years

Answer

3.27×$$10^{7}$$ years

Answer

5.50×$$10^{7}$$ years