Ответ:

а) \(\sqrt{169}\cdot\sqrt{9}=13\cdot3=39\).

б) \(\sqrt{289\cdot25}=\sqrt{289}\cdot\sqrt{25}=17\cdot5=85\).

в) \(\sqrt{361\cdot16\cdot49}=\sqrt{361}\cdot\sqrt{16}\cdot\sqrt{49}=19\cdot4\cdot7=532\).

г) \(\dfrac{\sqrt{81\cdot36}}{\sqrt{625}}=\dfrac{9\cdot6}{25}=\dfrac{54}{25}\).

д) \(\sqrt{\dfrac{324}{25}}\cdot\sqrt{\dfrac{225}{144}}=\dfrac{18}{5}\cdot\dfrac{15}{12}=\dfrac{9}{2}\).

е) \(\sqrt{(24{,}6)^2}=|24{,}6|=24{,}6\).

ж) \(0{,}5\sqrt{(-4)^2}=0{,}5\cdot|-4|=0{,}5\cdot4=2\).