6. Suppose a 100-gallon tank is full of fresh water initially, with 5 gallons of salt water being pumped in every minute and 5 gallons of the mixture being removed. However, suppose that the system takes a while to clear residual fresh water out of the intake, so that the concentration of salt in the incoming water is 0.25(1 – e-t/5) lb/gal. Find a formula for A(t), the amount of salt in the water in the tank (in pounds) after t minutes.

Q: -0.50 1.00 а) 0.60 -100 -0.50 b) 0.60 100 -1.00 -0.50 1.00 c) 0.60 -1.00 -0.50 1.00 d) 60 -1.00

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Average

In mathematics, everyone must have heard the term average in one place or other. Almost all types of calculation require taking out an average. In everyday life, the term is used for denoting a certain amount that can be said to be a typical quantity for multiple people or objects. In other words, if a group of people possesses a certain object, then the average gives us an idea regarding the quantity of the object possessed by each person. However, this is solely based on mathematical calculation. It is important to note that most people will not strictly have the average value in a group.