Can someone plz help me, I’ll really appreciate it!

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? a) 6 b) 8 c) 14 d) 20

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

Which of the following is the true for f(x) = 5cos