Answer:

Explanation:
9 x 9 x 9 x 9 is 9 multiplied by itself four times, so it's 9 to the 4th power as typed above.
Its not showing the underlined part so I cant help sorry
The most common is Chicago style.
Answer: D.
Explanation: Because A B, and C are what you are supposed to do when summarizing an essay and D is when your writing a story.
<u><em>Hope this help bud</em></u>
Many phrases could be used here like How " did you" or How " much distance " etc.