Salt water of concentration 0.1 pound of salt per gallon flows into a large tank that initially contains 40 gallons of pure water. If the flow rate of salt water into the tank is 5 gal/min, find a formula for the salt concentration
(in lb/gal) after t minutes.
A) 
B) 
C) 
D) 
E) 
Correct Answer:
Verified
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