On July 4, 1054, a brilliant light appeared in the constellation Taurus the Bull. The supernova, which could be seen in daylight for some days, was recorded by Arab and Chinese astronomers. As it faded, it remained visible for years, dimming for a time with the 77.1-day half life of the radioactive cobalt-56 that had been created in the explosion. Suppose that an American, of the people called the Anasazi, made a charcoal drawing of thesupernova. In the year of 2,013, the carbon-14 in the charcoal has decayed to what fraction of its originalactivity? State your answer in the nearest thousandth.

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To find the fraction of original activity of carbon14 in the charcoal drawing made ... View the full answer