What do you see?optical illusions more on this in chemistry!

If calculating interest by the previous balance method, purchases and payments during the month __ counted in calculation of interest. a. are b. are not c. must be d. are sometimes

What is the term eccentricity a measure of?

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?