Answer:
The amount of water dripping after 20 minutes = 2.69 units
Explanation:
The formula that show the amount of water that drips in 
 minutes is given as:
 minutes is given as:

To find the amount of water dripping after 20 minutes.
Solution:
In order to find the amount of water dripping after 20 minutes we will plugin 
 in the given formula.
 in the given formula.
So, the amount of water dripping after 20 minutes will be given as:




Thus, the amount of water dripping after 20 minutes = 2.69 units