What is 7% tax on a $9.79 purchase

All u do is put 9.79 multiplied by .07 and it gives you 0.6853 so its .68 or .69 cents if u round

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?