A because it is going from a higher point to a lower point as the line moves forward.
Answer:
18/4=x/10
Step-by-step explanation:
We are working on the same thing lolll
Assume a solution of the form
. Taking the differential of both sides would give the ODE

where
and
. The ODE is exact if
. We have


so the ODE is not exact. However, multiplying both sides by
gives

and now


so the ODE is now exact.
Now,


So the ODE has solution

or simply
