Question

Which number is irrational? A. 0.3 B. [5 C. 0.777 D. 00.454445

Answer 1

C.0.777 decuase it is smart

Answer 2

Answer:

Option B - $\sqrt{5}$ is an irrational number.    

Step-by-step explanation:

Given : Numbers

To find : Which number is irrational?

Solution :

Rational numbers is defined as numbers which is written in $\frac{p}{q}$ form where p and q are integers and q is non-zero.

Irrational numbers is defined as numbers which is not written in $\frac{p}{q}$ form where p and q are integers and q is non-zero.  

A) 0.3

$0.3=\frac{3}{10}$ written as p/q form.

So it is a rational number.

B) $\sqrt{5}$

$\sqrt{5}=2.2360679775...$ is not written as p/q form.

So it is an irrational number.

C) 0.777

$0.777=\frac{777}{1000}$ written as p/q form.

So it is a rational number.

D) 0.454445

$0.454445=\frac{454445}{1000000}$ written as p/q form.

So it is a rational number.

Therefore, Option B $\sqrt{5}$ is an irrational number.