You've got to compare two charts of information. The first chart is the cockroach:
It starts at and travels a constant speed of , so it's position vs. time equation is
You know you want to intercept the cockroach when it has traveled 2.10 m, so this is at
So you have to intercept the cockroach at a position of 3.08 m in 0.954545 s.
You start at the origin, with a speed of . We are assuming that you might be accelerating, so your position vs. time equation is:
and you need to be at at .