Hunter finished exercises p.348 (29-32) on combinations. I then taught him the Rational Root Theorem. It states that the factors of the constant of a polynomial, divided by the factors of the coefficient of the leading term, give you all of the possible roots (or zeros) of a polynomial. Those possible roots can then be tested to see if they are actual roots. The process is tedious, and each problem takes several steps. Hunter did p. 339 (1-3, 6)