Answer:
The last one
Step-by-step explanation:
x can only have one value whereas y can be constants like in last graph
Answer:
5 liters
Step-by-step explanation:
10 x 0.5 = 5
Let

. Then

and

are two fundamental, linearly independent solution that satisfy


Note that

, so that

. Adding

doesn't change this, since

.
So if we suppose

then substituting

would give

To make sure everything cancels out, multiply the second degree term by

, so that

Then if

, we get

as desired. So one possible ODE would be

(See "Euler-Cauchy equation" for more info)
Answer:
1 hour and 54 minutes and ignore this stuff sjsjsbdbsj