Volume of water in the tank:

Differentiate both sides with respect to time <em>t</em> :

<em>V</em> changes at a rate of 2000 cc/min (cubic cm per minute); use this to solve for d<em>h</em>/d<em>t</em> :


(The question asks how the height changes at the exact moment the height is 50 cm, but this info is a red herring because the rate of change is constant.)
It is probably random, since they are asking random users to identify new features they would use. :)
Answer:
13 integer
14 integer
-16 integer
147 integer
100000 integer
-3 integer
-0.35 not integer
Explanation:
The integers are all negative or positive whole numbers
NO!!!!!!!!!!
10% of 50 is 50/100x10 0r simply 50/10, so the answer is 5