Final answer:
It would take 45 drops from a dropper that produces 1 milliliter per drop to fill a 45 milliliter test tube.
Step-by-step explanation:
The question asks how many drops from a dropper with each drop having 1 milliliter volume it would take to fill a 45 milliliter test tube. To solve this, we use a simple division because the number of drops needed is the total volume of the test tube divided by the volume of each drop. Using the given information, the calculation is as follows: 45 mL ÷ 1 mL/drop = 45 drops Therefore, it would take 45 drops to fill the 45 milliliter test tube using the dropper.