7. Which number is an irrational number?

Question

a) Square Root 3 (i can't make the symbol)
b) - 13.5
c) 7/11
d) 1 over square root 9 (can't make the symbol)
My Answer - D
Am I correct?

Answer 1

My answer would be a) sqrt (3)

b) 27/2
c) 7/11
d) 1/3
all rational because written as ratios of whole numbers.

Answer 2

oh yeah that make sense because square root of 3 are non-perfect squares and non-perfect squares are irrational

thank you