1. 5,730 years; The graph shows that 50 percent of the carbon-14 atoms have decayed after 5,730 years, so 5,730 is the half-life of carbon-14.

## What is carbon-14 rate of decay or half-life?

5,730 ± Carbon-14 has a half-life of 5,730 ± 40 years—i.e., half the amount of the radioisotope present at any given time will undergo spontaneous disintegration during the succeeding 5,730 years.

## How long would carbon-14 have 3 half lives?

5730 years The half-life of carbon-14 is 5730 years. 1 half-life there is 50%=12 of the original amount left. 2 half-lives there is 25%=14 of the original amount left. 3 half-lives there is 12.5%=18 of the original amount left.

## What percentage of carbon-14 remains after 11460 years?

The currently accepted value for the half-life of 14C is 5,730 years. This means that after 5,730 years, only half of the initial 14C will remain; a quarter will remain after 11,460 years; an eighth after 17,190 years; and so on.

## What percentage of carbon-14 is present given that carbon-14 has a half-life of 5730 years?

95 percent If greater likelihood is sought, we could look at the interval 5730 /pm 80 years, encompassing two standard deviations, and the likelihood that the half-life of a given sample of Carbon 14 will fall in this range is a little over 95 percent.