What is the definition of harmattan

The causes of the failure of the league of nations

The blue segment below is a diameter of oo. what is the length of the radius of the circle?

You have been tasked with sorting the rock samples shown into three categories, with two rocks in each category. what attribute would you use to sort these rocks? which rocks would be in each category? rocks: obsidian, coquina limestone, granite, soapstone,pumice, and gneiss.