Question

is the square root of 400 iratinal or ratinal explain?

Answer 1

whole numbers are rational
400 can be written as 4*100
both are perfect squares and you can do sqrt(4)*sqrt(100)
what do you think?

Answer 2

so i thought it was rational ?

Answer 3

yes. sqrt(400) = 20
20 is a whole number, so it is rational
rational from ratio: a whole number divided by another whole number.
20 can be thought of as 20/1 so it is rational