Quick Pitch on yeast cake question

I brewed a pale ale about 5 weeks ago and transfered out of my carboy about 1.5 weeks ago and left my yeast cake of US-05 in the carboy just sitting out in ambient temperatures (~67 F)

I'm brewing a pretty big IIPA (lots of trub/hops)nd want to pitch right onto that US-05. 2 questions

1. I should be all right with healthy viable yeast count right? Even though it was out in ambient temps for awhile?

2. Should I get rid of half the trub in it by dumping it then pitching onto yeast cake? I'd say there is a good amount of beer didn't get racked over to keg (3 pints maybe?)

Thanks!

It sounds like you left some wort on top of it, which is good. I do this with all my pales - leave it sealed up, dark and cool (mine is usually a little cooler, say 64/65) and dump out the trub. I've never had an issue.

How do you "dump out the trub" while leaving in the yeast?