science
posted by courtney .
if a egyptian mummy has 61% carbon14 how long ago was it buried?
Take a 100 g initial sample. Now there are 61 g C14.
Use ln(No/N) = kt
where No = 100
N = 61
You will need k and you may obtain that from k = 0.693/t_{1/2}.
Look up t_{1/2} and substitute in that equation to find k, then substitute k in the first equation I listed. Post your work if you get stuck.
Respond to this Question
Similar Questions

geology
suppose you have a sample of clamshell at a paleoindian site and you measure the 14c activity of aa 100gram sample of carbon as 320 disintegretions per scond (or 3.2 disingtegrations per gram of carbon per second). a. what was the … 
Pre Calculus
The burial cloth of an Egyptian mummy is estimated to contain 56% of the carbon14 it contained originally. How long ago was the mummy buried? 
statistics
A professional basketball player has embarked on a program to study his ability to shoot foul shots. On each day in which a game is not scheduled, he intends to shoot 100 foul shots. He maintains records over a period of 40 days of … 
Precalculus
The burial cloth of an Egyptian mummy is estimated to contain 57% of the carbon14 it contained originally. How long ago was the mummy buried? 
Precalculus
The burial cloth of an Egyptian mummy is estimated to contain 57% of the carbon14 it contained originally. How long ago was the mummy buried? 
PreCalculus
The half life of Carbon14 is 5730 years. a. find the rule of the function that gives the amount remaining from an initial quantity of 100 milligrams of carbon14 after t years. b. the burial cloth of an egyptian mummy i sestimated … 
Chemistry
7. A 100.00g sample of the gaseous hydrocarbon ethane is a gaseous hydrocarbon, with 79.89g of carbon and 20.11g of hydrogen. Ethylene is a different gas phase hydrocarbon. A 100.00g sample of ethylene has 85.63g of carbon with 14.37 … 
Chemistry
A 100.00g sample of the gaseous hydrocarbon ethane is a gaseous hydrocarbon, with 79.89g of carbon and 20.11g of hydrogen. Ethylene is a different gas phase hydrocarbon. A 100.00g sample of ethylene has 85.63g of carbon with 14.37 … 
Chemistry
100 g piece of granite and a 100 g piece of lead are placed in an oven that is at 100°C. The initial temperature of the pieces are 25°C. After a couple of minutes, neither one is at 100°C, but which one is warmer? 
Physics
(a)A fossilised tree was tested and contains 10 grams of Carbon14. Given that there was 12 grams of Carbon14 present when it died, determine the age of the fossil?