Let k be the set of real numbers greater than or equal to twelve

I assumed that it would like this, the greater than or equal to sign in the expression k≥12. We begin with the left side of the interval notation.Since you entered an equal sign, this interprets to [ since we include the number 12 Based on the ≥ you entered, the right side of the interval notation will encompass to positive infinity, which is signified as +∞
So it would look like [12, +∞)
The set builder notation would look like:{K | X  ≥  12} where “|” denotes such that.
The display for the representation is:12,13,14,15,16,17,18,19,20,21,22,...,∞