Which cambridge mathematics professor developed the theory of universal gravitation that revolutionized astronomy? a. isaac newton b. rené descartes c. andreas vesalius d. francis bacon

What principle did president truman invoke in sending u. s. troops into south korea without first asking congress to declare war?

Which of the following american companies had a monopoly in the late 1800s? a. deere and company b. sears, roebuck and company c. standard oil company d. general electric company

Which of these played the biggest role in increased urbanization in the late 1800s? a) transportation improved b) the military was stronger c) no one was farming anymore d) steam power was discovered