Question

The amount of carbon -14 present in 9433 years will be approximately blank grams. Round to the nearest whole number

Answer 1

The decay model is given as,

$A\text{ = 16e}^{-0.000121t}$

After t = 9433 years,

$\begin{gathered} A\text{ = 16e}^{-0.000121\times9433} \\ A\text{ = 16e}^{-1.141393} \\ A\text{ = 16 }\times\text{ 0.3194} \\ A\text{ = 5.11 }\approx\text{ 5} \end{gathered}$

Thus amount of carbon left is 5 grams.