John can produce 20 shoes or 200 shirts. Mike can produce 100 shoes or 200 shirts. What is John's opportunity cost for 1 shoe in terms of shirts given up?

Amain reason most irish immigrants came to the united states in the mid-1800s wasa) to find jobs as skilled workers.b) to escape a potato famine.c) to live in less-crowded conditions.d) to escape religious persecution.

What were the purposes of salt? check all of the boxes that apply. -to achieve peace -to protect the security of the united states -to form an alliance against communist nations - to stop the nuclear arms race - to give the united states an advantage over the soviet union

•the impact of enlightenment ideals on the development of economic, political, and religious structures in the western world