It is adding one little percentage of increase here. or, 1.1 each time....hope that this helps.
Answer:
9
It is 9 because 9 is the only number that multiplied by itself is 81.
Answer: the last one!! 
Step-by-step explanation:
When there is a line under it means no more than!
Me no understand spanish buddy
Answer:
6) a.
7) d.
8) a.
I hoped this helped! Please mark me brainliest. Thanks!