Question

a hiker in africa discovers a skull that contains 43% of its original amount of c-14 Find the age of the skull to the nearest year
N=Noe^-kt

No=inital amount of c-14 (at time t=0)
N= amount of c-14 at time t
K=.0001
??????????????

Answer 1

N=0.43No
so
0.43No=Noe^-0.0001t
0.43*e^0.0001t=1
Ln 0.43+Lne^0.0001t = Ln 1
Ln0.43 +0.0001t = 0
t=-Ln0,43/0.0001 =8439,7