which one of the following numbers is an irrational number

a. square root of 3
b. 0.25
c. 1/4 ***
d. square root of 9
HELP ME PLS!

which one of the following numbers is an irrational number

a. square root of 3
b. 0.25
c. 1/5 ***
d. square root of 9
HELP ME PLS! THIS IS THE REAL QUESTION I WROTE IT WRONG

https://www.mathsisfun.com/definitions/rational-number.html

NO !
1/5 is ratio of two whole numbers. It is rational.
however
try sqrt 3 on your calculator

.25 is 1/4 .... rational

sqrt 9 is 3 ..... rational

I am very worried. Check that "math is fun" link.