Answer:
[14, 44)
Step-by-step explanation:
Let's let x = the time that Greg needs to visit his parents each year to attain Gold status.
9 100 ≤ 650(x) < 28 600 (Divide both sides by 650 to get x alone)
14 ≤ (x) < 44
There the answer in Interval Notation will be:
[14, 44)