Last year for a nation to the south, net domestic product at factor cost equaled $3,300 billion. Indirect taxes minus subsidies equaled $200 billion, depreciation equaled $800 billion, the statistical discrepancy equaled zero, and net operating surplus equaled $150 billion. What is the GDP?

What greek scientist created a screw to move water for irrigation?

Which of the following discoveries would be most likely to cause a scientific paradigm shift? a. the discovery of more rings around uranus b. the discovery of a new pathogenic virus transmitted by mosquitoes c. the discovery that a dormant volcano is showing signs of activity d. the discovery of a new species of salamander in the amazon rainforest e. the discovery that excess heat is radiating from the center of the earth and causing global climate change

11. why do citizens have to register to vote?