Final answer:
Kevin combined 11 1/2 sections of a zipline, where each section is 3 feet long, resulting in a total combined length of 34 1/2 feet.
Step-by-step explanation:
To find out the total length of Kevin's zipline made up of sections that are each 3 feet long, we multiply the number of sections by the length of each section. There were 11 1/2 sections of the zipline, and if we're told that each section is 3 feet long, we'd calculate the total length as follows:
11 1/2 sections x 3 feet per section = 34 1/2 feet.
Therefore, Kevin combined a total of 34 1/2 feet for the zipline.