Nigel walks *x* miles due west, turns 150° to his left and walks 3 miles in the new direction. If he finishes at a point 2 miles from his starting point, then *x* is:

- 13/10
- 39/10
- 1.5√3
- not uniquely determined by the given information.

At this point, Nigel is 2 miles from his starting point.

Ack! There are two possible starting points, look:

So, we can’t tell. It’s (d).