What were the policies of ming and qing dynasties towards the rest of the world??

Both of these dynasties tried to preserve the strength of China and to prevent the large influence of Western countries (especially Great Britain) that gradually started consuming China's economy. That at the end led to the destruction of Imperial system.

Explanation:

These two dynasties were the last ones that were at the head of Imperial China. Both of them had to face hard challenges especially after the foreigners started affecting China's economy. This was especially the case with the Qing dynasty. They tried to prevent Britain from gaining monopoly, but at the end that led to wars between these two country. People were unsatisfied and the uprising started that led to disappearance of Imperial China in 1912.

254.34

step-by-step explanation:

the formula for area of a circle is given by

a = pi * r^2

a = pi * 9^2

a = 81*pi

using 3.14 as an approximation for pi

a = 3.14*81

a = 254.34