Why must an air traffic controller know a plane's velocity? A. to know how far away the plane is
B. to know how high the plane is flying
C. to know the plane's overall rate of motion
D. to know the plane's direction as well as its speed

The architect's side view drawing of a saltbox-style house shows a post that supports the roof ridge. the support post is 8 ft tall. the distance from the front of the house to the support post is less than the distance from the post to the back of the house. how far from the front of the house is the support post positioned?