Can someone please help I don’t get the x were you can choose any year

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?

Name the most appropriate metric unit for each measurement

If g(x) is an odd function, which function must be an even function?