How are ya homies? Doin good?

This is an ap world history question. i am working on a worksheet which has a vent diagram with each circle labeled either us or byzantine economy. the middle is the similarities. can someone explain to me the similarities and especially the differences between the two?

How many neutrons does an element have if its atomic number is 40 and its mass number is 156?

Submitting the profile which includes sending a report to one college cost