Which feature of the Hindu-Arabic numeral system was an improvement over previous numeral systems?

A. the concept of zero

B. the use of prime numbers

c. the development of number lines

D. the creation of multiplication tables

HEL

Which statement reflects a citizens need to increase his civic particpation

How was the appointment of two consuls during the roman republic an example of a democratic principle? one consul represented patricians and one represented plebeians, so that all citizens had representation each consul had control over the same number of military legions, which prevented either one from a forceful takeover. consuls had to agree on all decisions, which prevented any one person from gaining too much power. consuls had to make decisions based on majority rule in the senate. quickly

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.