Alan

Note that $\log(a)-\log(b)=\log(\frac{a}{b})$

Multiply m^2 by 10^-4 to get hectares.

Like so:

Sequence:  $\frac{1}{8}, \frac{1}{8}+d, \frac{1}{8}+2d, \frac{1}{8}+3d, \frac{1}{5}$

Last term:  $\frac{1}{8}+4d=\frac{1}{5}$  Use this to find d, then you can find and sum the three middle fractions.

You can write  $e^{i\theta}=\cos \theta+i\sin \theta$, so the real part of each number (a, c and f) is obtained using $\cos \theta$ and the imaginary part (b, d and g) using $\sin \theta$.

As follows:

The following gives a possible solution, subject to some assumptions:

As follows:

90 km/h = 25 m/s

relative speed: lynx-rabbit = (25 - 18) m/s = 7 m/s

Time for lynx to catch rabbit = 20/7 s ≈ 2.9 s

So rabbit will get to burrow before lynx catches it.

See the following:

Wow!  You have a strange concept of "fun" Melody!!  I don't think I would have found it fun at all.