How many states does it take to amend the constitution?

A proposed amendment becomes part of the Constitution as soon as it is ratified by three-fourths of the States (38 of 50 States).

34

Explanation:

2/3rds of the states need to agree to amend the constitution, and 2/3rds of 50 is 33.333 so 34 states would be needed.

du boi was considered a radical because he wanted the immediate end for segregation. the biggest different between him and booker t. washington is that, even though washington believed that segregation should be considered illegal, he did not believe at all that a law was needed to keep blacks away from whites and that this would be something natural (to have the races apart) for a long time until society adjusted, while du boi believe that agitation was the only way to end segregation.