What is the equivalent expression to 20- (20x0.3)

What is the relationship of the letters n.y.l> w.c to the new york infirmary for women and children

Did the spanish settlers and missions have a positive effect on world history? why, what did they do that was positive? why was the treaty of paris (1763) good for the world/world history? did the plymouth colony have a positive effect on world history? why, what did they do that was positive?

Why did the skill of writing disappear from mycenaean society