To determine which of the provided options is a rational number between 5 and 514, we'll evaluate each option:
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√26: This is an irrational number. The decimal approximation is approximately 5.099, which is between 5 and 514 but not a rational number.
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518: This number is greater than 514, so it does not fall within the range.
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51/8: This is a rational number.
- Calculating: \( 51 ÷ 8 = 6.375 \), which is greater than 5 and less than 514.
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525: This number is also greater than 514, so it does not fall within the range.
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52/5: This is a rational number.
- Calculating: \( 52 ÷ 5 = 10.4 \), which is greater than 5 and less than 514.
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513: This number is less than 514 but still greater than 5.
Given the evaluations, the rational numbers that fall between 5 and 514 are 51/8 and 52/5. However, since the question asks for a single rational number, the best choice is:
51/8.