How did the tang dynasty try to create a more stable economy?

It is 1902 i make 45,000 per year how much do i owe in federal income taxes

Which of the following inventions most directly allowed ancient farmers to produce a surplus ?

This pie chart shows statistics related to the world's population. a pie chart like this one is most for making predictions about the future. showing how parts make up a whole. presenting amounts over a period of time. comparing information from different sources.