area of study that applies the basic principles of mathematics to the preparation and safe and effective use of pharmaceuticals

Pharmaceutical calculations

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application of mathematics that require study

Pharmaceutical Calculations

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A numerical representation of the relationship between two parts of the whole or between one part and the whole

Ratio

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an expression of equality between two ratios

Proportion

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compares values

Ratio

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says how much one thing there is compared to another thing

Ratio

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1:2 is aka

1 part to 2 parts

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What words can you use in numerical ratios

per, in, or, of , to

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Says that 2 ratios are equal

Proportion

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is the expression of the equality of two ratios

Proportions

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relative magnitude of two quantities

Ratio

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The product of the extremes is equal to the product of the?

Means

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proportion can be presented as

a:b=c:d, a:b::c:d or a/b=c/d

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proportion can be presented as

a:b=c:d, a:b::c:d or a/b=c/d

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A conversion method based on comparing a complete ratio with a missing component.

Ratio-Proportion Method

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Rules of Ratio- proportion method

3 of the 4 amounts must be known, numerators must have the same unit of measure, denominators must have the same unit of measure

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are used to describe IV solutions and topically applied to drugs

Percent strengths

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The higher the % of dissolved substances? (what happens to the strength)

, the greater the strength

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Are consecutive figures that express the value of a denominate number accurately enough for a given purpose

Significant Figures

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rules for the significance of zero

Any zero between digits is significant, Initial zeros to the left of the first digit are never significant, they are there to show the location of the decimal point and give place value to the digits that follow, One or more final zeros to the right of the decimal point may be taken to be significant

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