\[\boxed{\mathbf{1002\ (c).\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[7260 = a_{0}\left( 1 + \frac{10}{100} \right)^{2}\]
\[7260 = a_{0}(1 + 0,1)^{2}\]
\[7260 = a_{0}(1,1)^{2}\]
\[a_{0} = \frac{7260}{{1,1}^{2}}\]
\[a_{0} = 6000\]
\[Ответ:6000\ руб.\]