Where does a tone peak

You will use the model of the basilar membrane from the lesson. A tone of frequency $f$ in hertz peaks at a distance from the apex of the cochlea that follows the Greenwood function.

The idea. $x = 35 \times \dfrac{\log_{10}(f/165.4 + 0.88)}{2.1}$ millimetres, for a basilar membrane 35 mm long.

Your tasks.

1. Finish from_apex. It gives the distance from the apex in millimetres.
2. Set positions to the distances of the tones in tones, rounded to one decimal place, in the same order.
3. Finish nearer_base. It gives True when the first tone peaks nearer to the base than the second tone does.