Question: What percent of carbon 14 would be left after 5700 years?

This makes sense since 50% would remain after 5700 years, 25% would remain after 11,400 years, 12.5% would remain after 17,100 years, 6.25% would remain after 22,800 years, 3.125% would remain after 28,500 years, and 1.5625% would remain after 34,200 years.

How many grams of carbon will it have after 5700 years?

This answer makes sense because the half-life of 14C is 5700 years, meaning there would be 10 g left after 5700 years and 5 g after 11,400 years.

What percentage of material would remain if C 14 has gone through 4 half lives?

22,800 is exactly 4 half lives, so the amount remaining is 6.25% or one sixteenth.

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