What are the answers for these two math problems? : 1.) 2:15, 3:47, 5:19, 6:51, ?

2.) 29, 23, 19, 17, 13, ?

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?

How many $20 bills do you need to have to make $280

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?