38: Shortage
39: Price equilibrium
40: unsure, possibly Utility
41: Diminishing Utility
42: Demand
43: Expenses
44: Opportunity cost
45: Possibly Trade off
46: don't know
47: don't know.
D. To take the holy land back from the Islamic empires
it was a dramatic change in the way people lived and farming quickly eliminated herding as a way of life around the world
Leapfrogging, also known as island hopping, was a military strategy employed by the Allies in the Pacific War against Japan and the Axis powers during World War II.
Hope this helped.
Answer:
Elisha Graves Otis invented the safety elevator
