The isotope has a half-life of 5,715 years. After 2,000 years, a sample of the isotope is reduced to 1.2 grams. What was the initial size of the sample (in grams)? How much will remain after 20,000 years (i.e., after another 18000 years)? Round your answers to four decimal places.
A) 1.0706 , 0.0947
B) 2.4471 , 0.2164
C) 1.5294 , 0.1352
D) 2.1412 , 0.1893
E) 1.9883 , 0.1758

Question

The isotope  has a half-life of 5,715 years. After 2,000 years, a sample of the isotope is reduced to 1.2 grams. What was the initial size of the sample (in grams)? How much will remain after 20,000 years (i.e., after another 18000 years)? Round your answers to four decimal places.
A) 1.0706 , 0.0947 
B) 2.4471 , 0.2164 
C) 1.5294 , 0.1352 
D) 2.1412 , 0.1893 
E) 1.9883 , 0.1758

Quizplus · Accepted Answer

The Answer of The isotope  has a half-life of 5,715 years. After 2,000 years, a sample of the isotope is reduced to 1.2 grams. What was the initial size of the sample (in grams)? How much will remain after 20,000 years (i.e., after another 18000 years)? Round your answers to four decimal places.
A) 1.0706 , 0.0947 
B) 2.4471 , 0.2164 
C) 1.5294 , 0.1352 
D) 2.1412 , 0.1893 
E) 1.9883 , 0.1758

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