The amount of carbon 14 remaining in a sample that originally contained A grams is given by
C(t) = A(0.999879)t
where t is time in years. If tests on a fossilized skull reveal that 99.89% of the carbon 14 has decayed, how old, to the nearest 1,000 years, is the skull?

Question

The amount of carbon 14 remaining in a sample that originally contained A grams is given by
C(t) = A(0.999879)t
where t is time in years. If tests on a fossilized skull reveal that 99.89% of the carbon 14 has decayed, how old, to the nearest 1,000 years, is the skull?

.sam. · Answer

Is the time in exponential form?
$$C(t) = A(0.999879)^t$$