Mathematics, 03.12.2021 08:40 ethanboshears15

When a rock sample from a rock bed was examined, it was found that 5.7 kilograms of the total mass of the sample was copper If this sample contains 25% of the total copper in the rock bed, how many kilograms of copper were in the rock bed?

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When a rock sample from a rock bed was examined, it was found that 5.7 kilograms of the total mass o...