To determine which of the numbers could logically specify how many cups of flour to use in a bread recipe, we need to consider that the measurement of flour must be a non-negative number.
Let's evaluate the options:
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4 over 7: This is a positive fraction (approximately 0.57), so it is a valid measurement for cups of flour.
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2 and 3 over 4: This is equal to \(2 + \frac{3}{4} = 2.75\), which is also a positive number, making it a valid measurement.
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−3: This is a negative number, which cannot be used to specify a quantity of flour.
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Square root of 3: This is approximately 1.732, a positive number, so it is also a valid measurement.
Based on this analysis, the numbers that could be used to specify how many cups of flour should be used in a bread recipe are:
- 4 over 7
- 2 and 3 over 4
- Square root of 3
The only option that is not valid is −3.