Noah writes and attempts to solve an absolute inequality to model the following
situation.
Volunteers building a ramp must use boards within 0.35 centimeter of 122 centimeters.
What lengths are acceptable for the boards used to build the ramp?
Noah’s work:
|x - 122| ≥ 0.35
0.35 ≥ x - 122 ≥ 0.35
122.35 ≥ x ≥ 122.35
What mistakes did Noah make?