Please answer a & b. thank you! A tank initially holds 100 gal at brine solution containing 0.25 lb of salt per gallon. Pure water flows into th tank at thee rate of 2 gal/min, and the well-stirred mixture runs out at the same rate. Find a.) the amount of salt in the tank at any time t and b.) the time require for half the salt to leave the tank.

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Q: required

A: Please refer to the image below

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