Arwen uses a dropper that produces drops that have a volume of 1/8-milliliter to fill a 30-milliliter test tube. How many drops does it take to fill the test tube?

It takes 240 drops to fill the test tube

Step-by-step explanation:

Dropper produces 1/8 milliliter per drop

1 drop=1/8 milliliter

Consider the expression below;

Total volume to be filled=Volume of 1 drop*Number of drops

Where;

Total volume to be filled=30 milliliter

Volume of 1 drop=1/8 milliliter

Number of drops=N

Replacing in the expression above

30 = (1/8) * N

N = (30*8) = 240 drops