Using Newton's 2nd Law: sumF=m*a and it's rotational analog: sumt = I*a = rF, solve for I by eliminating F to get I_exp = (r^2m(g-a))/a Can someone help me understand how to do this? I am quite lost.

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