Hey there,
I don't get your question but I can explain what a plateau is:
https://en.wikipedia.org/wiki/Plateau
Number nine across is 9 justices.
Well I think Angels Merici dedicated herself to, A. Helping people in need
Answer:7
Explanation:So it says the total of the numbers is 63. There are 9 numbers so you divide 63/9. So 9*7=63