571. е) \( \left(\frac{7}{12} + \frac{5}{36}\right) \cdot 13 \);

\( \frac{7}{12} + \frac{5}{36} = \frac{21}{36} + \frac{5}{36} = \frac{26}{36} = \frac{13}{18} \). Теперь умножаем: \( \frac{13}{18} \cdot 13 = \frac{169}{18} \approx 9.389 \).