question_answer

Simplify: \[\frac{25\times {{a}^{-\,4}}}{{{5}^{-\,3}}\times 10\times {{a}^{-\,8}}}\]

A)  \[\frac{5\,{{a}^{2}}}{2}\]                  

B)  \[\frac{25\,{{a}^{3}}}{2}\]

C)  \[\frac{125\,{{a}^{4}}}{2}\]               

D)  \[\frac{625\,{{a}^{4}}}{2}\]

E)  None of these