Umm, I think it is the first one.
If n is rational, it means that

Therefore when we do n² we can write it as

Remember that the product of two integer numbers is also an integer, therefore we can guarantee that

Then we can confirm that n² is the quotient of two integers and the denominator is not zero, therefore, n² is always rational, it cannot be an irrational number
Answer:
hi
Step-by-step explanation:
This is how you write 5.24 in expanded form 5+0.2+0.04