Which indian mathematician and astronomer wrote that watch was a rotating sphere

Under president reagan, the united states began to develop the strategic defense initiative, nicknamed "star wars.” what was the goal of that plan?

Mark each statement if it describes one of the problems experienced by most of rome's common people in the early days of the republic

Why was carnegie steel able to offer its product at a lower price than its competitors? a. carnegie cut corners in his production, lowering his costs. b. carnegie made a weak product, which was less expensive. c. carnegie owned the raw materials, factories, and distribution. d. carnegie created the bessemer process, which lowered costs.