To find the value of \( \sqrt{68} \) and determine between which whole number and rational number (to the nearest half) it lies, let's start by calculating \( \sqrt{68} \).
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Estimate \( \sqrt{68} \):
- We know that \( 8^2 = 64 \) and \( 9^2 = 81 \).
- Thus, \( \sqrt{68} \) is between \( 8 \) and \( 9 \).
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Get a more precise estimate:
- Let's calculate \( 8.5^2 \): \[ 8.5^2 = 72.25 \quad (\text{which is greater than } 68) \]
- Next, calculate \( 8.2^2 \) and \( 8.3^2 \): \[ 8.2^2 = 67.24 \quad (\text{which is less than } 68) \] \[ 8.3^2 = 68.89 \quad (\text{which is greater than } 68) \]
- Therefore, \( \sqrt{68} \) is between \( 8.2 \) and \( 8.3 \).
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Calculating for half-way marks:
- The mid-point between \( 8 \) and \( 8.5 \) is \( 8.25 \), and the mid-point between \( 8.5 \) and \( 9 \) is \( 8.75 \).
- Since \( \sqrt{68} \approx 8.246 \) (from our earlier estimates), it is less than \( 8.25 \).
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Conclusion:
- Since \( \sqrt{68} \) is between \( 8.2 \) and \( 8.3 \), we conclude that it is between \( 8 \) and \( 8.5 \).
Therefore, \( \sqrt{68} \) is between 8 and 8.5.