How many mile from east to west is the Persian empire?

The postal system was first used by the? Who created the log tables? What roman princples of government were incorporated into the US constitutions? What rivers are located in west Africa? What ruler created a law of code to rule his empire? What specific right enjoyed by full citizens was denied to partial citizens as Rome expanded? Where were the most important towns in the 11th century? How do the consuls rely on the senate when that have absolute power during wartime? In what ways did the Renaissance owe its existence to medieval civilization? How did the Romans make money? 18 What was the 'path to political power' that was common to the careers of Gaius Marius and Sulla? Did the Dutch began the African slave trade in Europe? The roman empire at its peak power was what type of society? Which western European countries are allies of US? How did the modern database evolve from file system management? What is the difference between the Indian and Western modal of secularism? What is the origin and meaning of the name 'Keith'? What systems of standardization did Shi Huangdi set up? What is the range of elevation between Eastern and Western kansas? What was the best way for merchants to handle trade in the Renaissance?