What important mathematical advances did Muslims bring to the West?

What was the most important consequence of the large-scale ecological changes in africa two hundred thousand years ago?

Most white men in the antebellum south could best be described as a) plantation owners. b) seafaring traders. c) merchants or shopkeepers. d) nonslaveholding family farmers.

Which answer best describes an advantage of shipping goods by canal? a) most towns would rather have canals then noisy railroads b) goods could travel very fast downstream in the canal system c) traveling by boat is a much more relaxing way to transport goods. d) heavy loads of goods could travel by boat more easily then if pulled by horses.