How did keplers discoveries contribute to astronomy?
answers: A they supported the heliocentric model. B they established the laws of planetary motion. C they explained how the sun rises and sets. D they made astronomy accesible to people who spoke italian.

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.