Question

 14

Answer 1

We can display the information given as an equation:
2000 * $r^{19}$ = 4000; r = increase per annum
Now, we rearrange and solve for r:
$r^{19}$ = 2
r = $\sqrt[19]{2}$ = 1.037.....
We can now work out the increase for 5 years like so:
2000 * $r^{5}$ = 2400.205..... ⇒ $2400