Question

50 POINTS PLEASE CHECK YOUR MATH BEFORE YOU POST OR I WILL REPORT AND TAKE BACK THE POINTS

Answer 1

The spear is 4620 years old.

N=N0e^-kt  

N0 = initial amount of C-14 (at time t = 0)  

N = amount of C-14 at time t  

t = time, in years  

k = 0.0001

N/N0 = e^-kt  

we know N/N0 is 0.63  

so we have:  

0.63 = e^-kt  

we can take the ln of both sides, leaving us with:  

ln0.63 = -kt  

t = ln0.63 / -(0.0001)  

t = 4620 years  

hope this helps with your thing!

-keynerd23

Answer 2

Answer:

Explanation:

you got it mixed up with 63% for your question.