The radioactive isotope X, decays to the stable isotope Y. The half-life of this process is 300 million years. If the original amount of X has been reduced by approximately 94%, how old is the rock that contains isotope X

Which phrase describes the paleo-indians of prehistoric arkansas? a. grew cornb. lived in cliff dwellings c. crafted beautiful potteryd. hunted with stone-tipped spearswhich phrase describes native arkansas from the woodland traditiona. developed widespread agricultureb. hunted mastodon and woolly mammothc.built rectangle-shaped homesd. traded salt with other groups