How did the railroads impact time?

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.

Demographers can compare a choropleth map to a to understand how geography influences population distribution and there are no a, b,c, or d u have to find it out ur self asap

Which of the following did the maya, aztec, and inca all have in common