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Problem-Solving and Data Analysis / Percentages Difficulty: Hard

According to a set of standards, a certain type of substance can contain a maximum of $0.001 percent sign$ phosphorus by mass. If a sample of this substance has a mass of $140$ grams, what is the maximum mass, in grams, of phosphorus the sample can contain to meet these standards?

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Explanation

The correct answer is $.0014$ . It's given that a certain type of substance can contain a maximum of $0.001 percent sign$ phosphorus by mass to meet a set of standards. If a sample of the substance has a mass of $140$ grams, it follows that the maximum mass, in grams, of phosphorus the sample can contain to meet the standards is $0.001 percent sign$ of $140$ , or $StartFraction 0.001 Over 100 EndFraction left parenthesis 140 right parenthesis$ , which is equivalent to $left parenthesis 0.00001 right parenthesis left parenthesis 140 right parenthesis$ , or $0.0014$ . Note that .0014 and 0.001 are examples of ways to enter a correct answer.