Answer:Approximately 8 round trips
Explanation:
The distance between Seattle and Miami is 2,724 miles.
The distance of a round trip is the total distance that you cover when you travel from Seattle to Miami and return from Miami to Seattle. Therefore
Round trip = 2 × 2724 = 5448 miles
You earn a free flight after you accumulate 43,000 miles of travel. This means that the number of round trips that you must make between Seattle and Miami in order to earn a free flight would be
43000/5448 = 7.89
Approximately 8 round trips