The answer is c! you just subtract: 3/2-1/2, which is 1.
Yes, because 1/4 plus 1/4 equals 2/4 (or 1/2) and 3/4-2/4 equals 1/4.
You take 3/4 and multiply that by eight and you’ll get 6
From the table we notice that:

This means that Diana traveled 11595 ft more than martin; this also means that Jake and Abby traveled more than that amount farther than Martin's balloon (since their distances are greater that Diana's distance)
Therefore, Abby's Jake's and Diana's balloons traveled 11595 ft farther than Martin's balloons.
This would be 50 rounded to the nearest ten