Question 1
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How did Bill Gates contribute to the technological revolution during the twentieth century?

Bill gates made the computer affordable and with the window operating system brought it across to the world.

Explanation:

There were many operating systems that could be said to be better than or more effective than Windows but the fact was that Bill Gates understood hat sooner or later computers would reach the whole world.

He made the system keeping that in mind and made sure that the rates of the computers thus being sold would fall down and the system he is using would be easy for the people who do not want to use it a s a programmer but as a user.

This method changed the game of computer technology.

in 1803 the louisiana purchase took place, doubling the size of the country. by 1840 almost 7 million americans had migrated westward in hopes of securing land and being prosperous. the belief that settlers were destined to expand to the west is often referred to as manifest destiny.

explanation:

the graph shows the spread of railways in the 1800s.

based on the graph, the conclusion that can be drawn about germany is answer d)   by 1880, germany had more rail lines than great britain and russia.