[tex]x = \dfrac{13}{5};\quad y = \sqrt 7;\quad z = \dfrac{10}{4};\quad t = 2.(61) \\ \\ x^2 = \dfrac{169}{25};\quad y^2 = 7;\quad z^2 = \dfrac{25}{4};\quad t^2 \approx 2.61^2 \\ \\ x^2 \approx 6.7;\quad y^2 = 7;\quad z^2 = 6.25;\quad t^2 \approx 6.81 \\ \\ \Rightarrow \boxed{z<x<t<y}[/tex]
