The Isotope Has a Half-Life of 5,715 Years

Multiple Choice

The isotope has a half-life of 5,715 years. Given an initial amount of 11 grams of the isotope, how many grams will remain after 500 years? After 5,000 years? Round your answers to four decimal places.

A) 7.2469 gm, 4.1988 gm
B) 6.2117 gm, 3.5989 gm
C) 10.3528 gm, 5.9982 gm
D) 4.1411 gm, 2.3993 gm
E) 12.4233 gm, 7.1979 gm