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Radioactive decay can be described by the following equation In A = In Ao - kt where Ao is the original amount of the substance, A is the amount of the substance remaining after time t, and k is a constant that is characteristic of the substance. For the radioactive isotope radon-222, k is -1 1.81 × 10-1 days. If the original amount of radon-222 in a sample is 72.1 mg, how much radon-222 remains after 4.20 days have passed? mg

Radioactive decay can be described by the following equation In A = In Ao - kt where Ao is the original amount of the substance, A is the amount of the substance remaining after time t, and k is a constant that is characteristic of the substance. For the radioactive isotope radon-222, k is -1 1.81 × 10-1 days. If the original amount of radon-222 in a sample is 72.1 mg, how much radon-222 remains after 4.20 days have passed? mg

College Algebra
College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter5: Exponential And Logarithmic Functions
Section5.5: Exponential And Logarithmic Models
Problem 30E: The table shows the mid-year populations (in millions) of five countries in 2015 and the projected...
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Radioactive decay can be described by the following equation In A = In Ao - kt where Ao is the original amount of the substance, A is the amount of the substance remaining after time t, and k is a constant that is characteristic of the substance. For the radioactive isotope radon-222, k is -1 1.81 x 10-1 days. If the original amount of radon-222 in a sample is 72.1 mg, how much radon-222 remains after 4.20 days have passed? mg
Transcribed Image Text:Radioactive decay can be described by the following equation In A = In Ao - kt where Ao is the original amount of the substance, A is the amount of the substance remaining after time t, and k is a constant that is characteristic of the substance. For the radioactive isotope radon-222, k is -1 1.81 x 10-1 days. If the original amount of radon-222 in a sample is 72.1 mg, how much radon-222 remains after 4.20 days have passed? mg
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