A patient takes $150 \mathrm{mg}$ of a drug at the same time every day. Just before each tablet is taken, $5 \%$ of the drug remains in the body.(a) What quantity of the drug is in the body after the third tablet? After the $n$ th tablet?(b) What quantity of the drug remains in the body in the long run?
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
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Units and Measurements
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A patient takes $150 \mathrm{mg}$ of a drug at the same time every day. Just before each tablet is taken, $5 \%$ of the drug remains in the body.
(a) What quantity of the drug is in the body after the third tablet? After the $n$ th tablet?
(b) What quantity of the drug remains in the body in the long run?
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