According to the census of 1790, about how many free people of african ancestry lived in the colonies?

Match these milestones in communication history with their correct dates. 1. telegraph 2. telephone 3. radio 4. computer 5. television 6. computer networking 7. internet

According to the graph above, in which location(s) do at least half of people practice christianity? a. zimbabwe only b. nigeria and mali only c. zimbabwe and south africa only d. zimbabwe, nigeria, and south africa only

Which type of market produces the highest level of output at the lowest price to consumers?