A medication was administered and the function is, N(t) = 200 (0.85)^(t-1), which represents the amount of effective medication available after each hour since the medication was given. ("t - 1", is included in the formula since it takes one hour for the medication to be absorbed in the bloodstream).  If each hour a drug is only 85% effective as previous hour, in time another dose will need to be given. How long will it take for the initial dose to reach a low level of 50 milligrams? Identify the independent and dependent variables.

College Algebra
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ISBN:9781938168383
Author:Jay Abramson
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Chapter6: Exponential And Logarithmic Functions
Section6.1: Exponential Functions
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A medication was administered and the function is, N(t) = 200 (0.85)^(t-1), which represents the amount of effective medication available after each hour since the medication was given. ("t - 1", is included in the formula since it takes one hour for the medication to be absorbed in the bloodstream).  If each hour a drug is only 85% effective as previous hour, in time another dose will need to be given.

How long will it take for the initial dose to reach a low level of 50 milligrams? Identify the independent and dependent variables.

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