what is it meant by "it would be interesting to know how many workers had been displaced by these inventions"

I'm assuming the context is about an invention that caused many to lose their jobs. It isn't grammatically correct, but it's saying that the number of worker displaced by these inventions is very interesting, and hasn't been counted.

Explanation:

it is a because im a fod nigba

the two things that develop a strong social foundation are: a. separation of church and states e. education received attention separation of church and states separate the illogical  argument that came from religious beliefs to a fact based belief. while education will make us remember the past to avoid the repeat of our mistakes.