Which inequalities are true? Select the four correct answers.

A. [tex]\sqrt{5} \ \textless \ 2.3 \ \textless \ \sqrt{6}[/tex]

B. [tex]\sqrt{5} \ \textless \ 2.4 \ \textless \ \sqrt{6}[/tex]

C. [tex]\sqrt{4} \ \textless \ \sqrt{5} \ \textless \ \sqrt{5.5}[/tex]

D. [tex]\sqrt{8} \ \textless \ 3 \ \textless \ \sqrt{9}[/tex]

E. [tex]\sqrt{8} \ \textless \ 2.9 \ \textless \ \sqrt{9}[/tex]

F. [tex]\sqrt{4} \ \textless \ 4.5 \ \textless \ \sqrt{5}[/tex]



Answer :

Let's analyze the given inequalities step-by-step:

1. For the inequality [tex]\(\sqrt{5} < 2.3 < \sqrt{6}\)[/tex]:

- The square root of 5 ([tex]\(\sqrt{5}\)[/tex]) is approximately 2.236.
- The square root of 6 ([tex]\(\sqrt{6}\)[/tex]) is approximately 2.449.

Checking the inequality:
[tex]\[ \sqrt{5} \approx 2.236 \quad \text{and} \quad \sqrt{6} \approx 2.449 \][/tex]

Comparing with 2.3:
[tex]\[ 2.236 < 2.3 < 2.449 \][/tex]

Since the values fit correctly, this inequality is true.

2. For the inequality [tex]\(\sqrt{5} < 2.4 < \sqrt{6}\)[/tex]:

- We already know [tex]\(\sqrt{5} \approx 2.236\)[/tex].
- We already know [tex]\(\sqrt{6} \approx 2.449\)[/tex].

Checking the inequality:
[tex]\[ 2.236 < 2.4 < 2.449 \][/tex]

Since these values also fit correctly, this inequality is true.

3. For the inequality [tex]\(\sqrt{4} < \sqrt{5} < \sqrt{5.5}\)[/tex]:

- The square root of 4 ([tex]\(\sqrt{4}\)[/tex]) is exactly 2.
- The square root of 5 ([tex]\(\sqrt{5}\)[/tex]) is approximately 2.236.
- The square root of 5.5 ([tex]\(\sqrt{5.5}\)[/tex]) is approximately 2.345.

Checking the inequality:
[tex]\[ 2 < 2.236 < 2.345 \][/tex]

Since these values fit correctly, this inequality is true.

4. For the inequality [tex]\(\sqrt{8} < 3 < \sqrt{9}\)[/tex]:

- The square root of 8 ([tex]\(\sqrt{8}\)[/tex]) is approximately 2.828.
- The square root of 9 ([tex]\(\sqrt{9}\)[/tex]) is exactly 3.

Checking the inequality:
[tex]\[ 2.828 < 3 < 3 \][/tex]

Since [tex]\(\sqrt{9}\)[/tex] is exactly 3, the inequality 3 < [tex]\(\sqrt{9}\)[/tex] would not hold true. Therefore, this inequality is false.

5. For the inequality [tex]\(\sqrt{8} < 2.9 < \sqrt{9}\)[/tex]:

- We already know [tex]\(\sqrt{8} \approx 2.828\)[/tex].
- We already know [tex]\(\sqrt{9} = 3\)[/tex].

Checking the inequality:
[tex]\[ 2.828 < 2.9 < 3 \][/tex]

Since these values fit correctly, this inequality is true.

6. For the inequality [tex]\(\sqrt{4} < 4.5 < \sqrt{5}\)[/tex]:

- We already know [tex]\(\sqrt{4} = 2\)[/tex].
- We already know [tex]\(\sqrt{5} \approx 2.236\)[/tex].

Checking the inequality:
[tex]\[ 2 < 4.5 < 2.236 \][/tex]

Since 4.5 is much greater than [tex]\(\sqrt{5}\)[/tex], this inequality is false.

Thus, the four correct inequalities are:

1. [tex]\(\sqrt{5} < 2.3 < \sqrt{6}\)[/tex]
2. [tex]\(\sqrt{5} < 2.4 < \sqrt{6}\)[/tex]
3. [tex]\(\sqrt{4} < \sqrt{5} < \sqrt{5.5}\)[/tex]
4. [tex]\(\sqrt{8} < 2.9 < \sqrt{9}\)[/tex]

The correct answer selections are: (1), (2), (3), and (5).

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