Correct option is DGiven:55−6÷555×55−8Formula Used:am÷an=am−nam×an=am+nSolution:55−6÷555×55−8=55−6−5×55−8=55−11×55−8=55−11−8=55−19Simplified Result:55−19or15519\textbf{Given:} \\55^{-6} \div 55^{5} \times 55^{-8} \\\\\textbf{Formula Used:} \\a^m \div a^n = a^{m-n} \\a^m \times a^n = a^{m+n} \\\\\textbf{Solution:} \\55^{-6} \div 55^{5} \times 55^{-8} \\= 55^{-6 - 5} \times 55^{-8} \\= 55^{-11} \times 55^{-8} \\= 55^{-11 - 8} \\= 55^{-19} \\\\\textbf{Simplified Result:} \\\boxed{55^{-19}} \\\text{or} \\\boxed{\dfrac{1}{55^{19}}}Given:55−6÷555×55−8Formula Used:am÷an=am−nam×an=am+nSolution:55−6÷555×55−8=55−6−5×55−8=55−11×55−8=55−11−8=55−19Simplified Result:55−19or55191