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Mathematics, 20.04.2021 18:20 marlesly87

An Advertisement says that 9 tenths of dentists recommended using a certain brand of toothpaste. the equation below shows that the same fraction of a group of 400 dentists recommended using the brand of toothpaste. How many of the 400 dentists recommended the brand of toothpaste?

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An Advertisement says that 9 tenths of dentists recommended using a certain brand of toothpaste. the...
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