A 10-gallon barrel is filled completely with pure water. Salt water with a concentration of 0.3 lb/gal is then pumped into the

Question

A 10-gallon barrel is filled completely with pure water. Salt water with a concentration of 0.3 lb/gal is then pumped into the barrel, and the resulting mixture overflows at the same rate. The amount of salt in the barrel at time it is
Q(t) = 3(1e-0.09t)
where t is measured in minutes and Q(t) is measured in pounds.
(a) How much salt is in the barrel after 9 min? (Round your answer to two decimal places.)
(b) How much salt is in the barrel after 18 min? (Round your answer to two decimal places.)

Kunduz · Accepted Answer

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