The Amount of Carbon-14 Remaining in a Sample That Weighs $X ( t ) = B ( 0.999879 ) ^ { t }$

Multiple Choice

The amount of carbon-14 remaining in a sample that weighs B is given by $X ( t ) = B ( 0.999879 ) ^ { t }$
where t is time in years. If tests on a fossilized skull reveal that 99.92% of the carbon-14 has decayed, how old is the skull
Select the correct answer rounded to the nearest integer.

A) 58,929 years old
B) 2,629 years old
C) 1,985 years old
D) 0 years old
E) 23,234 years old