x = ___ units.Round your answer to the nearest tenth.

Considering that we have here a right triangle we can use the Pythagoras theorem:
[tex]40^2=24^2+x^2[/tex][tex]1600=576+x^2[/tex][tex]x^2=1024[/tex][tex]x=\sqrt[]{1024}[/tex][tex]x=32[/tex]x is equal to 32 units.