User blog comment:4KS/Not Another Power Level Blog.../@comment-4493594-20130617025725/@comment-972068-20130617215917

C + 8.518 + 1/2 = C + 8.518 + 0.5 = C + 9.018

That's your power level, Jade. I'd add C, but chat time is near impossible to estimate, but C is between 0 and 1. So your power level is somewhere between 9.018 and 10.018. Of course, since you participate in chat often, it can't be equal to 9.018.

9.018 < Power Level <= 10.018

<= means less than or equal to

It's elementary.