An electron traveling due south enters a region that contains both a magnetic field and an electric field. The electric field lines point due west. It is observed that the electron continues to travel in a straight line due south. In which direction must the magnetic field lines point?

The direction of the magnetic field lines should point into the plane (downwards).

Explanation:

Direction of motion of electron v = south.

Direction of electric field E = west

As the electron is negatively charged

Direction of electric force = east

Now:

we know that magnetic force = q * V X B

for force to be in west direction

The magnetic field lines should point into the plane (downwards).

well, you would divide 135 by 33 to get your answer. then that is how many seconds it would take. boardman should fly about 132 m or 4.090909090909091 seconds.