An airplane is flying on a course of 400 at 400 mph.  A 70 mph wind coming from the east. What is the speed of the plane?

 (10 points)
A. 

354 mi/hr

B. 

359 mi/hr

C. 

400 mi/hr

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?