Consider three connected lakes, A, B, and C, where lake B has a volume of 2650 km3, and water flowsfrom lake A into lake B, and from lake B into lake C, both inflows and outflows at the same rate of525 km3/year. Suppose that at time t=0 (years), the pollutant concentration of lake B, caused by pastindustrial pollution that has now been ordered to cease, is five times that of lake A. If the outflowfrom lake B to lake C is perfectly mixed lake water, how long will it take to reduce the pollutionconcentration in lake B to twice that of lake A?Choose all correct answers.BApproximately 6.3 years.Approximately 4.4 years.Approximately 5 years.Approximately 8.3 years.Approximately 7 years.

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Answered: Consider three connected lakes, A, B,…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Assume that in a certain country, the rate at which jobs are created is proportional to the number of people who already have jobs. If there are 15 million jobs at t = 0 and 15.1 million jobs 3 months later, how many jobs will there be after 2 years?
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Michelle draws a restangle with a length of 6 cm. She draws a second rectangle with a length of 11 cm. Belinda continues drawing more rectangles, where for each restangle drawn, she uses a length that is 5 more centimeters than the length of the previous rectangle. If this pattern continues, what will be the length of the 11th rectangle?
Consider three connected lakes, A, B, and C, where lake B has a volume of 2650 km, and water flows from lake A into lake B, and from lake B into lake C, both inflows and outflows at the same rate of 525 km2/year. Suppose that at time t=0 (years), the pollutant concentration of lake B, caused by past industrial pollution that has now been ordered to cease, is five times that of lake A. If the outflow from lake B to lake C is perfectly mixed lake water, how long will it take to reduce the pollution concentration in lake B to twice that of lake A? (Choose all correct answers) OA More than five years. OB Less than eight years. OC Less than six years. D D. More than 11 years.
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3. A tank contains a solution of saltwater, where the concentration of salt changes over time as the tank is being filled and drained simultaneously. The volume of the solution is increasing at a constant rate of 0.5 liters per minute. The amount of salt (in pounds) is always 1/3 of the total volume of solution in the tank. How fast is the amount of salt (in pounds) increasing or decreasing after 5 minutes?
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2. Theorem LF = LD = G 63 E

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