The diagram shows a regular pentagon

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?

Find the value of the cosine for angle a

Paul’s car is 18 feet long. he is making a model of his car that is 1/6 the actual size. what is the length of the model?