Ijust need an explanation on how to solve these questions. it's about logs. sorry about the bad quality of the image.

In the final round of trivia competition, contestants were asked to name as many states that begin with the letter m as they could in 15 seconds. the bar graph shows the number of states the contestants were able to name. how many contestants participated in the final round of the competition?

Solve for n? [tex]z = \frac{3}{4} mn[/tex]

How do the number line graphs of the solutions sets of -23 > x and x-23 differ?