I think that she started with 10.. I'm not 100% sure, though
The next step would be 10n=5x-7+9-x
sincerely- brock<span />
Answer:
3.50x= t
Step-by-step explanation:
x square feet of teh floor
t= total cost
<span>the coordinates of vertex A = (1,1)
</span><span>the coordinates of vertex B = (2,3)
</span><span>the coordinates of vertex C = (2,1)
</span>
If

is the amount of salt in the tank at time

, then the rate at which this amount changes over time is given by the ODE


We're told that the tank initially starts with no salt in the water, so

.
Multiply both sides by an integrating factor,

:




Since

, we have

so that the amount of salt in the tank over time is given by

After 10 minutes, the amount of salt in the tank is