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Kobotan [32]
3 years ago
10

What did people do before the calculator was invented?

History
2 answers:
Yakvenalex [24]3 years ago
7 0
They used an Abacus.
zzz [600]3 years ago
4 0
I think they used the abacus, it was on spongebob once...:)) mark me for brainliest? <span />
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The civilizations of the Huang River valley and the Nile River valley were similar as both were ruled by dynasties. Option D is correct.

A dynasty is understood as a sequence of rulers from the same family, usually in the context of a feudal or monarchical system, but sometimes also appearing in elective republics.  The longest-surviving dynasty in the world is the Imperial House of Japan, otherwise known as the Yamato dynasty, whose reign is traditionally dated to 660 BC.

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Answer:  I found this article online so you probably have to tweak a few things to not get plagiarized by your teacher but here you go. I just put the useful info here but you could definitely cut some things out also. Websites url is : https://www.studentsofhistory.com/the-growth-pread-of-islam

The period following Muhammad’s death is known as the Rashidun Caliphate that lasted from 610-750. During this empire a Muslim administration and government was established and ruled the Middle East. The Caliphate was governed by The Righteous Caliphs, or spiritual leaders. By 644, these four leaders helped Islam spread and grow far and beyond the Middle East through conquests of major cities like Baghdad, Jerusalem, and Alexandria. North and Western parts of Africa were also conquered effectively taking control over much of the  Byzantine and Persian territory. The third Caliph Uthman created a version of the Quran that became standardized and widely used throughout the Islamic world in newly established schools that taught the Arabic language and Islamic studies. This was also a period in which hundreds of mosques were built throughout the empire.  

After the death of the last caliph in 661, the Umayyad Caliphate took control of the empire and ruled until 750. Historians regard this caliphate as the most powerful and expansive of the caliphs. The Umayyad Caliphate grew the Islamic Empire to its peak and expanded its control from the Middle East to parts of Asia, India, Northern Africa and parts of Europe.

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im answering this question so that you can mark brainliest to the other person

Explanation:

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Abraham Lincoln believed that southern states should be readmitted to the Union when twenty one percent of their citizens signed
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