A Plane Begins Its Takeoff at 2:00 P

Multiple Choice

A plane begins its takeoff at 2:00 P.M.on a 2100-mile flight.After 12.5 hours,the plane arrives at its destination.Explain why there are at least two times during the flight when the speed of the plane is 100 miles per hour. ​

A) By the Mean Value Theorem,there is a time when the speed of the plane must equal the average speed of 290 mi/hr.The speed was 100 mi/hr when the plane was accelerating to 290 mi/hr and decelerating from 290 mi/hr.
B) By the Mean Value Theorem,there is a time when the speed of the plane must equal the average speed of 145 mi/hr.The speed was 100 mi/hr when the plane was accelerating to 145 mi/hr and decelerating from 145 mi/hr.​
C) By the Mean Value Theorem,there is a time when the speed of the plane must equal the average speed of 84 mi/hr.The speed was 100 mi/hr when the plane was accelerating to 84 mi/hr and decelerating from 84 mi/hr.​
D) By the Mean Value Theorem,there is a time when the speed of the plane must equal the average speed of 112 mi/hr.The speed was 100 mi/hr when the plane was accelerating to 112 mi/hr and decelerating from 112 mi/hr.
E) By the Mean Value Theorem,there is a time when the speed of the plane must equal the average speed of 168 mi/hr.The speed was 100 mi/hr when the plane was accelerating to 168 mi/hr and decelerating from 168 mi/hr.​