"If I remember correctly when going back towards a singularity, theorists are coming up with 10 dimensions--so far. We percieve 4 dimensions, but exist/live in 3.5 dimensions."
The normal way is to say 3 + 1 dimensions. Time, although it is inextricably interwoven with space, does have different apparent properties. The other higher dimensions that are needed to explain the observed parameters and symmetries are somehow folded into the 4 dimensions we see. Quite complex mathematically and definitely only at the hypothesis stage.
Chrome
"Recollect me darlin, raise me to your lips, two undernourished egos, four rotating hips"