we know that
the number \(39\) in expanded form is equal to
\(39=3*10+9*1\)
so
in words
the number \(39\) has \(3\) tens and \(9\) ones
the \(3\) would be the tens place, and the \(9\) would be in the ones place
therefore
the answer is
the value of the digit, of number, \(9\) in the problem, is one, which is the value of place value