An artifact was found and tested for its carbon-14 content. If 79% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.
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Planet A has an average surface temperature of _170%. Planet B has an avergage surface temperature that is 5/5 times that of Planet A. Find the avergae surface temerature on planet B.