Which spanish explorer led the expedition that conquered the incas?
christopher columbus
hernan cortéz
francisco pizarro
ferdinand magellan

Who introduced arabic numerals to italy, which make bookkeeping possible? a. brunelleschi b. cosimo de medici c. fibonacci d. gregory xi e. giovanni de bicci de medici

What explains the political difference among african americans politicians during reconstruction

One of galileo’s contributions to science was a creating the coordinate plane system. b developing the scientific method. c improving the telescope. d inventing the astrolabe.