Can you answer yet another Science Question ??

#1
For a scientific twist:
If F(t) is the number of frogs at time t, S(t) is the number of snakes at time t, E(t) is the number of eagles at time t, then the pair of differential equations

dS(t)/dt = a F(t)
dE(t)/dt = b S(t)

where a and b are constants
allows to calculate the numbers of eagles and snakes over time

What is "d", then?

#12
d = differential
dS(t)/dt = limit for t2 -> t1 of (S(t2) - S(t1))/(t2 - t1)

Eagles won't suffer. They will eat snakes instead. And by the way, which hunter hunts frogs?

#14
If half of the frogs die for example because people want to eat frog legs, then half of the snakes will starve to death for lack of frogs and then half of the eagles will starve to death for lack of snakes.

The hint is the answer

I learnt about it in year 4

Oh no

Here is some more science about this
https://en.wikipedia.org/wiki/Lotka%E2%80%93Volterra_equations