• # question_answer 39) By which number should the decimal 8.9 be multiplied with so that the product is 31.15? A)  2.3                              B)  1.3           C)  3.5      D)  2.5

(c) Let number be$x$ Then $8.9\times x=31.15\,\,\therefore x$ $=\frac{31.156}{8.9}=\frac{\overset{\,\,\,\,\,\,\,\,\,\,35}{\mathop{\bcancel{3115}}}\,}{\underset{\,\,\,\,\,\,10}{\mathop{\bcancel{890}}}\,}=\frac{35}{10}=3.5$