Ответ:
а) \(\dfrac{6^{15}\cdot6^{11}}{6^{24}}=6^{15+11-24}=6^2=36\).
б) \(\dfrac{(5^3)^2\cdot3^{16}}{9\cdot225^7}=\dfrac{5^6\cdot3^{16}}{3^2\cdot(3^2\cdot5^2)^7}=\dfrac{5^6\cdot3^{16}}{3^{16}\cdot5^{14}}=\dfrac{1}{5^8}=\dfrac{1}{390625}\).
Ответ: а) \(36\); б) \(\dfrac{1}{390625}\).
