Resposta :
[tex]a)\;\sqrt{5}=2,2360...\Longrightarrow \sqrt{5}\approx2\\\\
b)\;\sqrt{7}=2,6457...\Longrightarrow\sqrt{7}\approx3\\\\
c)\;\sqrt{10}=3,1622...\Longrightarrow\sqrt{10}\approx3\\\\
d)\;\sqrt{20}=4,4721...\Longrightarrow\sqrt{20}\approx4\\\\
e)\;\sqrt{30}=5,4772...\Longrightarrow\sqrt{30}\approx5[/tex]