The bar diagram shows average rainfall for periods of 50 years. Study the bar diagram and identify the two periods in which a civilization would most likely collapse.
Precipitation in a Hot, Arid Land
Precipitation in Inche
09
08
0.7
06
0.5
04
03
02
0.1
OOK OSEC
2700-2650
2000-2550
1700-2700
2650-2600
3000 2950
2950-2900
2300-2350
Years in BC
2550-2500
2500-2450
2450 2400

Soon-yi's house has a hexagonal window made up of six identical equilateral triangles as pictured below.

George h.w. bush a) hosted the dayton peace talks b) lost support when he agreed to new taxes c) was president when the soviet union collapsed d) ordered relief aid to rwandan refugees

Two of these describe “federalism." (choose two answers) select one or more: a. the national government absolutely controls all state governments. b. power is shared by the national and state governments. c. state governments exercise absolute power over the national government. d. it is a compromise meant to eliminate the disadvantages of a “unitary” and a “confederate” system.