How were slaves essential to all 3 sides of the trade?

Ilive in michigan i went to iowa and killed someone i then went to florida for vacation i got caught for the iowa murder wile kicking back on the beach in miami where will i be tried

What two different approaches did the knights of labor and the american federation of labor take in building a union organization? a) the knights of labor accepted only unskilled workers; the american federation of labor accepted only skilled workers. b) the knights of labor accepted skilled and unskilled workers; the american federation of labor accepted only skilled workers.c) the knights of labor refused to accept african american or chinese workers; the american federation of labor accepted all workers.d) the knights of labor accepted workers from a single industry; the american federation of labor accepted workers from several industries.

What is the approximate area of a circle with a radius of 15 feet