з) $$-16 : (-\frac{4}{9});$$

$$-16 : (-\frac{4}{9}) = -16 \cdot (-\frac{9}{4}) = \frac{-16 \cdot (-9)}{4} = \frac{16 \cdot 9}{4} = \frac{4 \cdot 4 \cdot 9}{4} = 4 \cdot 9 = 36$$ Ответ: 36