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5 votes
Help I don't know any of this 

Which of the following is a not a rational number?
_
1.3
3.1415...
5.25
__
0.66

User Nashawn
by
8.2k points

2 Answers

6 votes
ratinonal numbers can repeat as long we can see the repeating part with a line over it (called a vinculum)
rational numbers can be written in form a/b where b is not equal zero

1.33333333333333 is repeating, it is 4/3

3.1415... is obviously an attempt to represent pi or π, the most famous irrational number

5.25 is easy, 5.25/1 or 525/100

0.6666666666666=2/3

the answer is 3.141592...
User Terry Lin
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7.7k points
3 votes
3.1415... is not a rational number because it is continuous.

Hope I helped :)
User Kikocorreoso
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8.2k points