Aaa I thought this was a question and was ready to get into full answering mode lol
0.27 = 3/x...multiply both sides by x
0.27x = 3...divide both sides by 0.27
x = 3/0.27 =
11.11 <==
The histogram that represents the data with the largest spread is Data Set B
3/8 = 0.375 hrs per wax
60 x 0.375 = 22.5 hrs for 60 cars