Question

4. Is this number rational or irrational? 49 O rational number оо irrational number

Answer 1

Rational

Explanation:

If the square root is exact, it is a rational number. Otherwise, it is irrational.

Examples:

1² = 1, so the square root of 1 is 1, which is rational.

2² = 4, so the square root of 4 is 2, which is rational.

3² = 9, so the square root of 9 is 3, which is rational.

There is no x for which x² = 5,6,7..., so the square roots of 5,6,7, for example, are irrational.

In this case:

7² = 49, which means that the square root of 49 is 7, which is rational.

Rational is the answer.