Let's go through the questions one by one.
Question 1
You are asked to determine the type of number resulting from the expression \( 14 + 2 - \sqrt{14 + 2} \).
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Calculate \( 14 + 2 \): \[ 14 + 2 = 16 \]
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Calculate \( \sqrt{16} \): \[ \sqrt{16} = 4 \]
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Now substitute back into the expression: \[ 16 - 4 = 12 \]
Now, we identify the type of number:
- \( 12 \) is an integer and also a rational number (since all integers are rational numbers).
Based solely on the options, the most straightforward answer would be Integer.
Question 2
You need to identify which of the given differences results in a rational number:
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Option 1: \( \sqrt{64} - \sqrt{7} \)
- \( \sqrt{64} = 8 \), so \( 8 - \sqrt{7} \). Since \( \sqrt{7} \) is irrational, this result is also irrational.
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Option 2: \( \sqrt{49} - \frac{1}{4} \)
- \( \sqrt{49} = 7 \), so \( 7 - \frac{1}{4} = \frac{28}{4} - \frac{1}{4} = \frac{27}{4} \), which is rational.
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Option 3: \( \sqrt{5} - 3.2 \)
- \( \sqrt{5} \) is irrational, and subtracting a rational number (3.2) from an irrational number results in an irrational number.
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Option 4: \( 6.2 - \pi \)
- \( 6.2 \) is rational, while \( \pi \) is irrational. Thus, their difference is also irrational.
Based on the evaluation, the only option that results in a rational number is Option 2: \( \sqrt{49} - \frac{1}{4} \).
Summary
- Question 1 Answer: Integer
- Question 2 Answer: \( \sqrt{49} - \frac{1}{4} \) (which simplifies to a rational number).