Percentage of sugar is : 2/12 = 0.166 rounds to 0.17 = 17%
1 and 2 cannot be proportional because proportional relationship should has a constant relationship
Answer:

Step-by-step explanation:
Let,
Now, us simplify the given differential equation and write it in terms of D,

or, 
or, 
We have our auxiliary equation:

or, 
or, 
Therefore our solution is,

and, 
Applying the boundary conditions, we get,


Solving them gives us,

Hence,
