Which idea was originated by a Muslim scholar during the Islamic Golden Age? Hindu number system
camera obscura
astrolabe
algebra

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

Transitioning countries must take into account the costs of capitalism, because they will experience its as the great depression's and they experience its benefits.

Which of these events related to the protestant reformationoccurred first in 1521?