How is the use of the word theory in science different from it's more common use?

A scientific theory enables predictions; a theory doesn’t .

A scientific theory is an explanation that has been so well established through many experiments that no new experiments are likely to change it. It enables scientists to make predictions about future experiments.

In common usage, a theory means a hunch or a guess. In science, we call such a guess a hypothesis.

93.2 ml + 3920 ml = 4013 ml total  

(93.2 ml) * (2.03 m) / (4013 ml) = 0.0471 m

the volume in in l of the diluted solution would be 0.0471 m.

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.