To specify how many cups of flour should be used in a bread recipe, the number must be a non-negative real number. Let's analyze the options provided:
- 47 - This is a positive integer and can be used to specify the amount of flour.
- Start Fraction 4 over 7 End Fraction (which is \( \frac{4}{7} \)) - This is a positive fraction and can also be used to specify the amount of flour.
- −3 (negative 3) - This is a negative number and cannot be used to specify the amount of flour.
- square root of 3 - This is a positive number (approximately 1.732) and can be used to specify the amount of flour.
- 234 - This is a positive integer and can also be used to specify the amount of flour.
Based on this analysis, the valid numbers that could specify the amount of flour are:
- 47
- \( \frac{4}{7} \)
- square root of 3
- 234
So, the appropriate choices are 47, \( \frac{4}{7} \), square root of 3, and 234.