(c) State why we maxy conelode that each number below is rational. \( \begin{array}{llll}\text { (1) } 1 \frac{3}{4} & \text { (2) }-3 \frac{1}{8} & \text { (3) } 4 \\ \text { (5) } 0,52 & \text { (6) } 1,212\end{array} \)

To determine that each number is rational, we can express them as fractions of integers. For instance, \(1 \frac{3}{4}\) can be rewritten as \(\frac{7}{4}\) (7 and 4 are both integers). Similarly, \(-3 \frac{1}{8}\) translates to \(-\frac{25}{8}\), and is rational as well. The integer \(4\) is inherently rational, as it can be represented as \(\frac{4}{1}\). For the decimals, \(0.52\) is rational since it can be expressed as \(\frac{52}{100}\) or simplified further to \(\frac{13}{25}\). The number \(1.212\) is also rational, represented as \(\frac{1212}{1000}\). In both cases, both numerators and denominators are integers, cementing their status as rational numbers.