Answer:
8 drops will take to fill the test tube.
Step-by-step explanation:
A volume of [tex]\frac{1}{8}[/tex] millimeter test tube is produced by the dropper that Arwen uses.
Now, we are asked to calculate the number of drops it will take to fill the test tube.
Then, [tex]\frac{1}{8}[/tex] of the millimeter test tube is equivalent to 1 drop.
So, 1 of the millimeter test tube will be  equivalent to [tex]\frac{1}{\frac{1}{8} } = 8[/tex] drops.
Therefore, 8 drops will take to fill the test tube. (Answer)