What entry does whispering winds corp. make at the maturity date, assuming gates pays the note and interest in full at that time?

Since the interest payable, principal and the maturity date was not given in this problem. I can only give you the account titles used and their respective debit and credit side. But to know the interest owed, used the formula I = Prt.

So when Whispering Winds Corporation receives the principal and the interest payment, the entry would be:

Debit Cash xx

Credit Notes Receivable xx

Credit Interest Income xx