Who established the first schools in the middle ages?

How were the okanogan highlands formed? a. by subduction, which caused huge folds in earths surface b. as a result of retreating glaciers carving great valleys into the earth c. when molten rock from under the earth approached the surface d. when the collision of volcanic island chains and ocean rocks formed new earth

The united states economy makes up how much of the worlds economy

Louisiana purchase timeline can someone give me the answers, it's due tomorrow.