Everyone today is affected by Martin Luther King. The way we live is completely different than the life he lived. He wanted change and today we have it.
Because Slate was more common in wet microclimates.
Hope I Helped :)
assuming efficiency of each man to dig trench, in one day, for one hour is constant,

so one man, working for one hour in one day can dig 1.5 m
so 8 men, working 3 hours a day and will take, say $d$ number of days and efficiency will be constant. so,
$\frac32=\frac{220}{8\times3\times d}$
$\implies d=\frac{55}9=6.12$
Voting as a partisan can be an effective way to mobilize your constituents to keep voting for you, as long as you don't engage even more partisan wings of your party.
Unlike moderates or people who compromise, partisans don't have the ability to draw new members into their coalition, unless new people see their way of thinking.
The three major schools of thought emerged from the Warring states period were-
1. Legalism- It was associated with Han Feizi. This thought spelled out and strictly enforced rules or laws through a system of rewards and punishments.
2- Confucianism- It was associated with Confucius. This was different from Legalism. It was not about the laws and punishments, but the moral example of superiors so as to restore social harmony after the Zhou and Qin dynasties.
3- Daoism- It was associated with Laozi. Daoists urged withdrawal into the world of nature and encouraged behavior that was spontaneous, individualistic, and natural.