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A patient initially takes 200 mg of a drug that dissolves at a rate of 5% each day. How many days will it take for 130 mg of the drug to be remaining (nearest hundredth)?

 Jan 14, 2020
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The amount of drug left each day is 95 %     .95 in decimal form

 

 

130 mg  = 200 mg (.95)t      Where t = days

130/200  = .95t

t = 8.40 days

 Jan 14, 2020

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