Kasia records run times in a bobsleigh race. the table below on the right shows the run times of each team in the race. the team with the shortest run time is the winner. kasia needs to announce the teams in 1st, 2nd and 3rd place. a. which teams finished in 1st, 2nd and 3rd place? remember to check your answer. b. what is the difference between the times of the 1st place team and the 2nd place team?

The winning team has the lowest time, 2nd place the second lowest time and so on.

From the times you provided, F is the shortest at 2:47.874, giving them first place. 
Second place goes to team A on 2:48.018
Third place is D=2:48.099

So, to recap, 1st=F,2nd=A,3rd=D

To find the difference in times between 1st and 2nd, simply subtract the 1st place time from 2nd place. 

2:48.018-2:47.874=1.44

So, to answer the second part of the question, the difference between A and B is 1.44 minutes

4 1/2 = 4.5
3 1/4 = 3.25
4.5 x 3.25 = 14.625
14.625 = 14 5/8 or 117/8