A tank contains 
L of brine with 
kg of dissolved salt.Pure water enters the tank at a rate of 
L/min.The solution is kept thoroughly mixed and drains from the tank at the same rate.How much salt is in the tank after 
minutes?
Definitions:
Interest Rate
The percentage of a loan charged as cost to the borrower for the use of the money.
Capital Projects
Long-term investments made by companies or governments to create, improve, or maintain physical assets.
Interest Rate
The percentage charged by a lender to a borrower for the use of assets, typically expressed as an annual percentage of the principal.
Present Value
The present value of a future amount of money or a series of cash flows, calculated using a predetermined rate of return.
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