Why is the united States a republic and democracy?

Can someone me answer all the questions?

Which area of economics uses value judgments to make recommendations for future actions?

Which methods of dealing with economic crisis that were established during the new deal are still used today? choose all answers that are correct. question 9 options: a providing a job for every american citizen b prohibiting any further immigration c regulating the stock market d paying pensions and benefits for the elderly, children, and the handicapped