A farmer would like to install a fence around his property which has a perimeter of 98m. He wants to use 4”x 4” posts. Each post should be spaced 3.5 m apart. The following sequence shows the first few distances at which the farmer will install posts: 0, 3.5, 7, 10.5....... a) How many posts will the farmer need?  b) At what distance will the 13th post be?

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