What are you safety carpenter has a board that is 8 feet long he cuts off two pieces one piece is 3 1/2 feet long and the other is 2 1/3 feet long how much of the board is left

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?