At any time
(min), the volume of solution in the tank is

If
is the amount of salt in the tank at any time
, then the solution has a concentration of
.
The net rate of change of the amount of salt in the solution,
, is the difference between the amount flowing in and the amount getting pumped out:

Dropping the units and simplifying, we get the linear ODE


Multiplying both sides by
allows us to identify the left side as a derivative of a product:



Integrate and divide both sides by
to get

The tanks starts off with 30 lb of salt, so
and we can solve for
to get a particular solution of

Answer:
If these two are supplementary angles, than <1 is 72 degrees.
Step-by-step explanation:
In order to find that, we simply need to subtract the first angle from 180 degrees.
180 - 108 = 72 degrees
Answer:
D because she is constantly going 70 MPH
Step-by-step explanation:
hope this helps
Step-by-step explanation:
multiply the outer term to the inner term
so, 6x-10.