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I am not really sure how to get right values for variables/constants:

A tank contains 100 gallons of salt water which contains 10 lbs of salt.

The well-stirred solution runs out of the tank at rate of 7 gall/min. Let A(t) be the amount of salt in lbs at time t in mins. The initial value problem for A(t) is ...

(to be found as a DE with IC).

V(0) = 100

r

A(0) = 10 gal.

The underlined section is where I need some help, at least then I can start on the problem and see how I end up.

Thanks in advance.

A tank contains 100 gallons of salt water which contains 10 lbs of salt.

__A salt solution of 2 lbs salt per gallon enters the tank at a rate of 3 gallons perminute while a flow of fresh water runs into the tank at rate 5 gallons per minute.__The well-stirred solution runs out of the tank at rate of 7 gall/min. Let A(t) be the amount of salt in lbs at time t in mins. The initial value problem for A(t) is ...

(to be found as a DE with IC).

V(0) = 100

r

_{2}(flow rate) = 7 gall/minA(0) = 10 gal.

The underlined section is where I need some help, at least then I can start on the problem and see how I end up.

Thanks in advance.

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