ANSWER
c) 3.445
EXPLANATION
It is important to first know what a rational number is.
A rational number is one that can be represented as a fraction of two integers:
[tex]\begin{gathered} \frac{a}{b} \\ \text{where a, b = integer} \end{gathered}[/tex]Therefore, 3.444... and 3.555... are irrational because they cannot be represented as simple fractions of two integers.
They are non-terminating decimals. They do not end.
From the options given, we see that only one option is a terminating decimal unlike the others.
That is 3.445.
It can be written as a fraction of two integers:
[tex]\begin{gathered} \frac{3445}{1000} \\ It\text{ can be reduced to } \\ \frac{689}{200} \end{gathered}[/tex]As we can see, 3.445 is a rational number.
