Who was Czar Nicholas II? and what did he do?

How did isolationism affect foreign policy?

What is the approximate area of a circle with a radius of 15 feet

Which effect did the united states supreme court's decision in plessy v. ferguson have? 1. ending segregation in all public schools in america 2. protecting voting rights for african americans by eliminating literacy tests 3. upholding the rights of all citizens to be treated equally by the government 4. authorizing the system that kept black and white people separated