Answer:
dx/dt = 4c - 4x/15
Step-by-step explanation:
a. Find a formula for the rate of change in the amount of salt, dx/dtdx/dt, in terms of the amount of salt in the solution
Let c be the concentration of the incoming brine in grams per liter. Since it flows in at a rate of 4 liters per minute, the mass flow in is thus 4m.
Let x be the mass of salt present at time, t. The concentration of salt present at time, t is thus mass of salt/volume of tank = x/15. Since the well mixed solution is drained at 4 liters per minute, the mass flow out is thus 4x/15.
The net rate of change of amount of salt dx/dt = mass flow in - mass flow out
dx/dt = 4c - 4x/15
<span>12/1-3/1=9/1 or twelve minus three equals nine you allready asked
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6+3×2
_____
3×4-10
do multiplication first
6+6
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12-10
add and subtract
12
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2
6
I think it’s -2.26794919i
Answer:
converse action
inverse object
contrapositive lokend
Step-by-step explanation:
