<span>It reduced coast-to-coast communication from about 180 days to about a week.
This question is mildly ambiguous due to the word "communication". Does it mean "Speed of sending a message?" or "Speed of moving a physical object?" Given the available options as answers, I will assume the meaning is "Speed of moving a physical object?" With that in mind, let's look at the available options and see what makes sense.
It made coast-to-coast communication instantaneous.
* Even modern jets can't travel from coast to coast instantaneously, so you wouldn't expect a train to do so either. So this choice is just plain silly and therefore wrong.
It reduced coast-to-coast communication from about a week to about a day.
* A stagecoach had an average speed of about 5 mph and covered 60 to 70 miles per day. So it's not going to go from coast to coast in only a week. And since that part of the answer is wrong, this choice is wrong.
It reduced coast-to-coast communication from about 180 days to about a week.
* The 180 day estimate is definitely doable. That's an average speed of about 17 miles per day which is a good speed for a person walking day to day. And that would be about 400 miles per day for the train. The numbers make sense and this is the correct answer.
It made coast-to-coast communication more complicated.
* Let's see. Buy a train ticket and possibly arrange for 6 layovers. Or plan a multiple month trip and possibly coordinate that effort without having any rapid means of communications? This option is just plain silly when you consider the logistics of traveling for several months vs traveling for a mere week. So this is a bad choice.</span>
When Henry Ford revolutionized the automobile industry with the assembly line, it cut away man hours and effort needed to create product. This made production faster, easier, and cheaper.
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The Mali Kingdom of West Africa first arose in the 13th century. Its founder, Sundiata, was the sole survivor of a massacre at the hand of an enemy king. Sundiata soon grew up to be a military genius and by 1250, reconquered all of the trade routes and former lands of Ghana and founded the kingdom of Mali (Mali means “where the king’s dwell”). The kings of Mali or “mansas” would continue to expand and strengthen the kingdom long after Sundiata dies.
Mansa Musa: Mansa Musa was the greatest king of Mali and reigned from 1312-1337. He expanded Mali’s borders north and west and made his empire safe and peaceful. He also converts to Islam and adopted Sharia law. Along with Mansa Musa, many higher class citizens of the empire also converted to Islam, however many commoners still retained their traditional animistic religion. Mansa Musa’s hajj to Mecca, was probably a large turning point in African history for several reasons covered below. Mansa Musa also invites many Arab scholars to his capital city of Timbuktu, as well as architects to help beautify the city by building mosques out of dried mud that are still standing today.
Explanation:
Answer:
Confucianism and Daoism spread as new ways of thinking and living.
Explanation:
because I just took the test hope this helps
The main role of deficit and surplus in the competitive market are the equilibrium-the state of the market, in which the volume of demand is equal to supply. The point of intersection of supply and demand is called the equilibrium point. The volume of sales at the point of equilibrium is called equilibrium volume. The price at the point of equilibrium is called the equilibrium price.
In equilibrium, the market is balanced. The installed price suits both sellers and buyers. If the price is not equal equilibrium market is not balanced. And buyers and sellers have effective incentives to change the situation.