SOLUTION: I am having issues with word problems, just not sure how to set them up and then complete. Radioactive carbon-14 decays according to the function Q(t)=Q0e^-0.000121t where t is

Question 1027427: I am having issues with word problems, just not sure how to set them up and then complete.
Radioactive carbon-14 decays according to the function Q(t)=Q0e^-0.000121t where t is time in years, Q(t) is the quantity remaining at time t, and Q0 is the amount present at t=0. Estimate the age of bone fragment if 17% of the original quantity of carbon-14 remains.
Thank you for all your help.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
They are saying that . This means,
at present, you have 17% of the amount you started with
which was
----------------------
Now I can rewrite the formula:

Now divide both sides by

Take the natural log of both sides

The age is 14,645 years
Check my math & maybe get another opinion
RELATED QUESTIONS
A certain radioactive substance has a half-life of 400 years. If 60 kg is accidently... (answered by scott8148)

I have a questions dealing with Logarithmic functions. The question I am dealing with is: (answered by stanbon)

I am having so much trouble with these two problems: Simplify the rational expressions: (answered by algebrahouse.com)

I am just not understanding the steps within the problems, how to set it up and go... (answered by Alan3354)

I am having trouble with proofs mainly over angles and lines. I am not sure how to... (answered by elima4)

Question asks:A jet plane traveling at 500 mph overtakes a propeller plane traveling at... (answered by stanbon)

I need help to learn how to set up equations so that I can solve it; Because I am having... (answered by rfer)

word problem help!! if I am trying to save $ for a video game and start with $1, each... (answered by solver91311)

The radioactive isotope carbon 14 used to date fossils decays with an annual rate of... (answered by math_tutor2020,josgarithmetic,ikleyn,greenestamps)