Let us take east and north as the positive x and y-axes should the motion be plotted in a cartesian plane. Thus, the x value is 45 miles and the y value is 20. The tangent of an angle is equal to the ratio of y to x.
   tanθ = y / x
Substituting,
   tanθ = 20/45 = 0.44
The value of θ is 23.96°.
        
             
        
        
        
A. through a relatively short distance.
The speed is actually called the drift speed of the electron.