Marissa spent $15.63 at the bookstore. she paid with a $20 bill how much change will she receive?

The money of how much she will receive will be $4.37

I’m not sure how this works

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?