Which number is an irrational number?

25 is a a rational number

15 is a rational number

1.15 is irrational number

and 1.25 is a rational number

Step-by-step explanation:

Answer

Square root 15

Step-by-step explanation:

When you square root the number 15 it will give you a decimal number with a lot of numbers that can't be rationalized. However the square root of 25 can be seen as 5, 1.15 is a rationalized number, 4th option can be seen 1.255555555... which is still rational.

2 over 5

step-by-step explanation:

the 2: 3 ratio is the length of the ac segment to the cb segment total length. this implies that the ratio between segment ac length and segment ab length is 2: 5. point c is 2/5 from a to b, so the required fraction is 2/5.