How many times does Greg need to fly to visit his parents and attain gold status? (one must fly less then 30000 but at least 10500)

Question

To qualify for Gold status at Awesome Airlines, one must fly less than 30000 but at least 10500 miles each year. If Greg takes a 750-mile round-trip flight when visiting his parents, how many times does Greg need to visit his parents each year to attain Gold status? Express your answer in interval notation.

Answer 1

10,500 ≤ 1500t ≥ 30,000

7 ≤ t ≥ 20

 

[7,20]