4. A tank contains 80 gal of pure water. Brine solution with 2 lb/gal of salt enters at 2 gal/min, and the well-stirred mixture leaves at the same rate. Find a) the amount of salt in the tank after half an hour, b) determine the limiting value for the amount of salt in the tank after a long time, and c) how much time must pass before the amount of salt in the tank reaches 80% of this limiting value?
4. A tank contains 80 gal of pure water. Brine solution with 2 lb/gal of salt enters at 2 gal/min, and the well-stirred mixture leaves at the same rate. Find a) the amount of salt in the tank after half an hour, b) determine the limiting value for the amount of salt in the tank after a long time, and c) how much time must pass before the amount of salt in the tank reaches 80% of this limiting value?
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Transcribed Image Text:4. A tank contains 80 gal of pure water. Brine solution with 2 lb/gal of salt enters at 2 gal/min, and
the well-stirred mixture leaves at the same rate. Find a) the amount of salt in the tank after half
an hour, b) determine the limiting value for the amount of salt in the tank after a long time, and
c) how much time must pass before the amount of salt in the tank reaches 80% of this limiting
value?
Transcribed Image Text:Word Problems: Solve the following word problems. Express all answers in simplest form with the
correct units. For decimal answers within computation, round to 4 decimal places, and for final
2 decimal places.
answer,
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