A plane is flying from Atlanta to Seattle, approximately 2,150 miles. The plane flies 30 miles beyond Seattle and then is put in a circular holding pattern around the city that can be modeled by y = 2150 + 30cos( π /10 x), where x is the amount of time that has passed and y is the plane's distance from Atlanta. If the plane circled for 50 minutes, how many revolutions did he complete?

A) 2

B) 2.5

C) 3

D) 3.5

Question

A plane is flying from Atlanta to Seattle, approximately 2,150 miles. The plane flies 30 miles beyond Seattle and then is put in a circular holding pattern around the city that can be modeled by y = 2150 + 30cos( π /10 x), where x is the amount of time that has passed and y is the plane's distance from Atlanta. If the plane circled for 50 minutes, how many revolutions did he complete?

A) 2

B) 2.5

C) 3

D) 3.5