mary lou is at a gas station wit her mother she is trying to figure out how much it is to fill uo the gas tank

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?

If anyone has done the algebra 2 chaos theory portfolio would you be wiling to me? i kind of know what i'm doing i just don't know if i'm doing it right.

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer