Answer:
3/4 milliliter per minute.
Step-by-step explanation:
If the system developed a small leak and it loses 15 milliliters every 20 minutes, then we can say;
15 milliliters = 20 minutes
We are to look for the speed of the water per minutes.
x milliliters = 1 minutes
Equating both expressions, we have;
15 milliliters = 20 minutes
x milliliters = 1 minutes
Cross multiply
20 * x = 15
x = 15/20
x = 3/4 milliliters
Hence the change is 3/4 milliliter per minute.