Answer:
C
Step-by-step explanation:
Answer:
(b) √5
Step-by-step explanation:
The square root of an integer is rational if the integer is a perfect square. You probably know the first few perfect square integers are 1, 4, 9, 16, 25, 36, ...
The integer 5 is not on that list, so its square root will be irrational.
√5 is irrational
2/5 + 1/2 = 0.9
0.9 in fraction form is 9/10!
Hope this helps!