What evidence does the author present about the life in Timbuktu and the city’s interaction with global markets?

1. which of the following factors would cause demand-pull inflation? a. serious crop failure b. significant decrease in the supply of oil c. increase in the money supply d. increase in the cost of raw materials for firms e. reduction in imports allowed into the country

Which theory of color vision most accurately describes the process of color vision at the level of the retina?

What information does a survey provide? a. an accurate description of the population surveyed b. whether there is a predictive relationship between two variables? c. whether there is a cause-and-effect relationship between two variables d. none