Why was the development of zero an important advancement in math? O Zero could be used to create integers. O Zero was used to represent a large value O Zero could be used as a placeholder or to write larger numbers. O Zero was used by Indian astronomers to calculate the sizes of stars. I'll give brainliest to whoever is right

What are the most populous and least populous areas of russia? and why are some areas more heavily populated than others?

Which factor contributed to the rise of african empires such as ghana and mali ? a. their creation and involvement in trade networks b. they focused only on agricultural production. c. they didn’t engage in warfare with other nations d. their geographic location protected them from attacks.

What factor contributed most to the beginning of the women’s rights movement in the united states during the mid 1800s? a dramatic increase in women’s participation in the workforce b a shift in social attitudes brought on by increased sectional tensions c the experience of gender discrimination within reform movements d the granting of voting rights to african american men