Answer:
8
Step-by-step explanation:
Let the number be x.
[tex]\rm \sqrt{2x} = 4[/tex]
Raise both sides of the equation by 2.
[tex]\rm (\sqrt{2x} )^2 = 4^2[/tex]
[tex]\implies \rm 2x = 16[/tex]
[tex]\implies \rm x = \frac{16}{2}[/tex]
[tex]\boxed{\rm x = 8}[/tex]
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