Question

the square root of 65 is 8 something right

Answer 1

Yes, because sqrt64 is 8, sqrt65 would be slightly more than 8 and would lie between 8 & 9.

Answer 2

8.06225774829855

Answer 3

this is uttely wrong squar root of 65 is8.0622

Answer 4

You have approximated it, I have written the value up to some certain number of digits. Both are not exactly equal to root 65 though, because it is irrational.