How much of an 800-gram sample of c14 is left after 3half-lives?

100 grams of c14 after 3 half lives ;) just divide 800\2 = 400 then 400/2 = 200 and lastly 200/2 = 100

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey

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