The iceman known as Ötzi was discovered in a high mountain pass on the Austrian-Italian border. Samples of his hair and bones had carbon-14 activity that was 50% of that present in new hair or bone. Carbon-14 undergoes beta decay and has a half-life of 5730 y.
The mummified remains of Ötzi were discovered in 1991.
a. How long ago did Ötzi live?
b. Write a balanced nuclear equation for the decay of carbon-14.
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