if carbon 14 has a half life of 24 days how much would be left of 220 gram sample after 168 days

Answer 1

x = Xi e^-kt

1/2 = e^-24 k

ln .5 = -24 k

-.693 = -24 k
k = .0289

so
x = 220 e^-.0289*168
= 220 * .00779
= 1.71 grams