Simply put, students with good study habits achieve better grades and are more successful in their classes.
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.
I guess it would either be mood or syntax
<span>I read the story about the history of the South that Professor Rasco assigned.</span>
He describes all different types of people in different classes