The main function of this human body system is to--- a. exchange gases with the environment

b. chew food as it enters the mouth

c. sense odors in the environment

d. trap particles that enter the nose

Anew movie is released each year for 14 years to go along with a popular book series. each movie is 2 minutes longer than the last to go along with a plot twist. the first movie is 70 minutes long. use an arithmetic series formula to determine the total length of all 14 movies