The Isotope Has a Half-Life of 24,100 Years

Multiple Choice

The isotope has a half-life of 24,100 years. Given an initial amount of 9 grams of the isotope, how many grams will remain after 2,000 years? After 20,000 years? Round your answers to four decimal places.

A) 5.9478 gm, 3.5442 gm
B) 3.3988 gm, 2.0253 gm
C) 8.4969 gm, 5.0632 gm
D) 10.1963 gm, 6.0758 gm
E) 5.0981 gm, 3.0379 gm