51. An accident at a nuclear power plant has left the surround- ing area polluted with radioactive material that decays nat- urally. The initial amount of radioactive material present is 15 su (safe units), and 5 months later it is still 10 su. How long-total number of months or fraction thereof-will it be until A = 1 su, so it is safe for people to return to the area?

51. An accident at a nuclear power plant has left the surround- ing area polluted with radioactive material that decays nat- urally. The initial amount of radioactive material present is 15 su (safe units), and 5 months later it is still 10 su. How long-total number of months or fraction thereof-will it be until A = 1 su, so it is safe for people to return to the area?

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter10: Sequences, Series, And Probability

Section10.2: Arithmetic Sequences

Problem 68E

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