When specifying how many cups of flour should be used in a bread recipe, you typically want a non-negative number, as you can't use a negative amount of an ingredient. Let's evaluate the options:
A. -3: This is a negative number and cannot be used. B. 4/7: This is a positive fraction and is acceptable. C. Square root of 3 (approximately 1.73): This is a positive number and is acceptable. D. 2 3/4 (which is 2.75): This is a positive mixed number and is acceptable.
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:
- B (4/7)
- C (Square root of 3)
- D (2 3/4)
So the valid options are B, C, and D.