Ответ:а) \(9^2=9\cdot9=81\).б) \(0.7^2=0.7\cdot0.7=0.49\).в) \(0.09^2=0.09\cdot0.09=0.0081\).г) \(0.01^2=0.01\cdot0.01=0.0001\).