-39 has no rational roots.
It isn't. All integers are rational numbers.
No, they are not.
No, they are not.
If there are no numbers after the 9 it is rational
The square root of 39 is not a rational number. It is somewhere between 6 and 7, but can only be written as radical(39). It is a non-ending decimal.No
Yes.
4u2 - 6u - 39 does not have rational factors.
Rounded to three decimal places, sqrt(39) = ±6.250
rational
that would would an irrational complex number. 6.245i
Yes, 7.8 is a rational number. Expressed as a top-heavy fraction, it is equal to 39/5 or thirty-nine fifths.
It's greatest possible perimeter: 1+39+1+39 = 80 feet