Answer:
Step-by-step explanation:
Is this the full question that is stated?
For all the other viewers of this question, the change was -403 feet or you could say 403 feet i guess but the answer is -403 feet
Answer:
The rate of decrease is: 
Step-by-step explanation:
Given

---- We used minus because the rate is decreasing
Required
Rate of decrease when: 
The volume of the cube is:

Differentiate

Make dV the subject

Divide both sides by dt

Given that:
and 



<em>Hence, the rate of decrease is: 43.2mm^3/min</em>