A tank initially contains salt in the pores if inert material and 10 gallons of fresh water. The salt dissolves at a rate per minute 2 times the difference between 3 lbs/gallon (concentration of a saturated solution) and the concentration of the brine. 3 gallons of fresh water per minute enters the tank. How much salt dissolves in 15 minutes?

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3.
A tank initially contains salt in the pores if inert material and 10 gallons of fresh water. The salt dissolves at
a rate per minute 2 times the difference between 3 lbs/gallon (concentration of a saturated solution) and
the concentration of the brine. 3 gallons of fresh water per minute enters the tank. How much salt dissolves
in 15 minutes?
Transcribed Image Text:3. A tank initially contains salt in the pores if inert material and 10 gallons of fresh water. The salt dissolves at a rate per minute 2 times the difference between 3 lbs/gallon (concentration of a saturated solution) and the concentration of the brine. 3 gallons of fresh water per minute enters the tank. How much salt dissolves in 15 minutes?
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