The isotope${ } ^ { 14 } \mathrm { C }$ 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

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The Answer of The isotope${ } ^ { 14 } \mathrm { C }$ 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 14C{ } ^ { 14 } \mathrm { C }14C

The Isotope ${ } ^ { 14 } \mathrm { C }$