The irrational number among those listed is given by:
C. √5.
What are rational and irrational numbers?
- Rational numbers are numbers that can be represented by fractions, such as terminating decimals, or repeating non-terminating decimal.
- Irrational numbers are numbers that cannot be represented by fractions, such as non-repeating non-terminating decimals and non-exact roots.
For this problem, we have that:
- 0.777 is a repeating non-terminating decimal, hence it is a rational number.
- 0.45454545... is a repeating non-terminating decimal, hence it is a rational number.
- The square root of 5 is a non-exact square root, hence it is an irrational number.
- 0.3 is a terminating decimal, hence it is a rational number.
Since the square root of 5 is the only irrational number, option C is correct.
More can be learned about rational and irrational numbers at brainly.com/question/17232771
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