Daron needs 20 pieces of string 38inch length. He cut 4 7/8-inch piece of string into pieces that are 38 of an inch long each. How many more pieces of string does he need?

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?