Each person in a group weighs at least 100 pounds and at most 130 pounds. How large must the group be in order to guarantee that there are at least 2 people whose weights differ by at most 9 pounds

For the answer to the question above, the solution to the problem is as follows:

the following asking for speed,

given:

distance =  -11 1/5 feet
time =    1 3/4 minutes

solution:

speed = distance/time =  -11 1/5 feet /  1 3/4 minutes = (-54/5) / (7/4) = -216/35 = -6 6/35

therefore,  jason's position relative to the leader change per minute is  -6 6/35 feet per minute.

i hope my answer has come to your .