The answer is (4,2).
Midpoint formula:
[tex](x \: y) = ( \frac{x2 - x1}{2}) (\frac{y2 - y1}{2} )[/tex]
Find the x value:
[tex]x = ( \frac{x2 - x1}{2} )[/tex]
Plug in the givens:
[tex]x = \frac{8 - 0}{2} = \frac{8}{2} = 4[/tex]
Find the y value:
[tex]y = ( \frac{y2 - y1}{2} )[/tex]
Plug in the values:
[tex]y = ( \frac{4 - 0}{2} ) = \frac{4}{2} = 2[/tex]
