If a truck that is traveling at 15 mph speeds up to 45 mph in 10 seconds, what is the truck’s acceleration? PLZ HELP

the great wall of china worked as a defense for the feudal states of the zhou dynasty to the north. during the warring states period more walls were put up to defend the borders of the different kingdoms. it was semi successful because despite the wall, the mongols eventually conquered china also the great wall provided protection to the economic development and cultural progress, safeguarded the trading routes such as the silk road, and secured transmission of information and transportation. @jayxboof

1(a) traditional methods of production are upheld.

2(d) to convert private property to state-owned property

3b) feudalism

5(a) question

6(c) to preserve the past

7(d) the opportunity to make a profit

8(b) get paid by the government

could not do 4 sorry. . hope this