Answer:
Explanation:
We aren't given the size of the Amoeba dubia. I assume it is probably given in mm or cm, or some such unit.
Use conversion factors to change the dimension:
1 picometer = 1 x 10^(-12) meters [I think you may have added one too many zeros in your number]
E.g., if it is given as X cm:
(X cm)*(1 m/100 cm)*(1 picometer/(1 x 10^(-12) meters))