Why was the development of zero an important advancement in math? A. Zero could be used to create integers.
B. Zero was used to represent a large value.
C. Zero could be used as a placeholder or to write larger numbers.
D. Zero was used by Indian astronomers to calculate the sizes of stars.
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Which reason best explains why certain areas of southwest asia have low population density? a. the semi-arid climate makes farming difficult because it produces very little rainfall. b. the moist climate limits job opportunities because it reduces oil production. c. the semi-arid climate produces heavy rainfall that contributes to devastating floods. d. the moist climate reduces agricultural production by causing water shortages.