Can someone help I don’t know the answer

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?

What is the measure of ac? 5 units 13 units 26 units 39 units

What is the approximate value of  q  in the equation below? –1.613–1.5220.5853.079