Concept explainers
Pollution A chemical plant discharges 2400 tons of pollutants every year into an adjacent lake. Through natural runoff, 70% of the pollutants contained in lake at the beginning of the yare are expelled by the end of the year.
(a) Explain why following sequence models the
(b) Find the first five terms of the sequence An.
(c) Find a formula for An.
(d) How much of the pollutant remains in the lake after 6 years? How much will remain after the plant has been operating a long time?
(e) Verify to part (d) by graphing
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Chapter 8 Solutions
College Algebra
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