(Solved): (1 point) A tank contains 90kg of salt and 1000L of water. A solution of a concentration 0.045 ...

(1 point) A tank contains $90\mathrm{kg}$ of salt and $1000\mathrm{L}$ of water. A solution of a concentration $0.045\mathrm{kg}$ of salt per liter enters a tank at the rate $10\mathrm{L}/\min$. The solution is mixed and drains from the tank at the same rate. a.) What is the concentration of our solution in the tank initially? concentration $=$ $(\mathrm{kg}/\mathrm{L})$ b.) Find the amount of salt in the tank after 2 hours. amount $=$ $(\mathrm{kg})$ c.) Find the concentration of salt in the solution in the tank as time approaches infinity. concentration $=$ $(\mathrm{kg}/\mathrm{L})$