Posted by keke on .
Which of the following numbers is irrational?
A 5/9
B 3.15
C /5
D 8.341
I THINK IT A

MATH 
keke,
CAN SOMEBODY HELP ME

MATH 
Steve,
a rational number can be written as a fraction.
Any terminating or repeating decimal is also rational.
√5 is not rational. There is no fraction which is exactly equal to √5. The decimal value goes on forever and never repeats.
It is easy to prove that √5 is irrational, if you are interested. Just google proofs for √2 and follow the same logic you find there. 
MATH 
keke,
so it c