How old would i would i be if i was still alive yesterday?

What event brought the us into wwii? what conflicts happened after the us entered the war? i know the first part of this question, i need with the second part.

Brainliesttt asap!me : ) answer in your own words. what was the relationship between medieval theories about scientific reasoning and the kind of reasoning favored during the scientific revolution?

Which of these was an accomplishment of the han dynasty? the invention of the seismograph finding a water passage to europe the invention of the ballpoint pen the invention of the abacus