Answered

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In a certain chemical, the ratio of zinc to copper is 3 to 14. A jar of the chemical contains462 grams of copper. How many grams of zinc does it contain?It containsgrams of zinc.

Sagot :

In order to calculate the amount of zinc in the chemical, we can use the following rule of three:

[tex]\begin{gathered} \text{grams}\to\text{ratio} \\ 462\to14\text{ parts} \\ x\to3\text{ parts} \\ \\ \frac{462}{x}=\frac{14}{3} \\ 14\cdot x=462\cdot3 \\ x=\frac{462\cdot3}{14} \\ x=99 \end{gathered}[/tex]

Therefore the amount of zinc is 99 grams.

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