a)
[tex] \sqrt{1600 } = 40[/tex]
b)
[tex] \sqrt{4900} = 70[/tex]
c)
[tex] \sqrt{250000} = 500[/tex]
d)
[tex] \sqrt{0.81} = 0.9[/tex]
e)
[tex] \sqrt{1.21} = 1.1[/tex]
