) A tank contains 200 gallons of water in which 50 pounds of salt are dissolved. A brine solution containing 4 pounds of salt per gallon is pumped into the tank at the rate of 6 gallons per minute. The mixture is stirred well and is pumped out of the tank at the same rate. Let A(t) represent the amount of salt in the tank at time t. a) Write down the differential equation and the initial condition.

Calculus: Early Transcendentals
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ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
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Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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) A tank contains 200 gallons of water in which 50 pounds of salt are dissolved. A brine
solution containing 4 pounds of salt per gallon is pumped into the tank at the rate of 6
gallons per minute. The mixture is stirred well and is pumped out of the tank at the same
rate. Let A(t) represent the amount of salt in the tank at time t.
a) Write down the differential equation and the initial condition.
b) Solve this initial value problem. How much salt will be present in the tank at time t?
c) As t→o, how much salt will be in the tank? Calculate lim A(t) using your solution
to the differential equation in part b).
d) Explain how you can answer the question how much salt will be in the tank after a
long time without solving the differential equation.
Transcribed Image Text:) A tank contains 200 gallons of water in which 50 pounds of salt are dissolved. A brine solution containing 4 pounds of salt per gallon is pumped into the tank at the rate of 6 gallons per minute. The mixture is stirred well and is pumped out of the tank at the same rate. Let A(t) represent the amount of salt in the tank at time t. a) Write down the differential equation and the initial condition. b) Solve this initial value problem. How much salt will be present in the tank at time t? c) As t→o, how much salt will be in the tank? Calculate lim A(t) using your solution to the differential equation in part b). d) Explain how you can answer the question how much salt will be in the tank after a long time without solving the differential equation.
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