Salena practises golf at a driving range by hitting golf balls from point  .

The first ball that Salena hits travels directly north, landing at point  .

The second ball that Salena hits travels 50 m on a bearing of 030°, landing at point  .

The diagram below shows the positions of the two balls after they have landed.
  

1. How far apart, in metres, are the two golf balls?  (1 mark)
2. A fence is positioned at the end of the driving range.

    

   The fence is 16.8 m high and is 200 m from the point  .

   
    
    
   What is the angle of elevation from   to the top of the fence?

    

   Round your answer to the nearest degree.  (1 mark) 

A ferry, , is 400 metres from point at the base of a 50 metre high cliff, .
 

1. Show that the gradient of the line in the diagram is 0.125.  (1 mark)
2. Calculate the angle of elevation of point from .
   

    

   Write your answer in degrees, correct to one decimal place.  (1 mark)

3. Calculate the distance , in metres, correct to one decimal place.  (1 mark)

For an observer on the ground at , the angle of elevation of a weather balloon at is 37°.

is a point on the ground directly under the balloon. The distance is 2200 m.

To the nearest metre, the height of the weather balloon above the ground is

A.   

B.  

C.   

D.   

E.