History, 19.02.2021 19:30 july00

Which of these advances did Han scientists make? Select all that apply. A: developed the concept of zero
B: devised the base-20 number system
C: created more accurate calendars
D: invented the compass
PLZ HELP QUICK IM DOING THE TEST RN

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Which of these advances did Han scientists make? Select all that apply. A: developed the concept of zero B: devised the base-20 number system C: created more accurate calendars D: invented the compass PLZ HELP QUICK IM DOING THE TEST RN

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Another question on History

Which of these advances did Han scientists make? Select all that apply. A: developed the concept of zero
B: devised the base-20 number system
C: created more accurate calendars
D: invented the compass
PLZ HELP QUICK IM DOING THE TEST RN