Have you taken a hydrometer reading? It probably already fermented out, especially if you pitched the yeast into 80F wort. Your bucket lid or stopper may not have been sealed fully, thus you may not have seen any bubbling in the airlock.
As Revvy would say, "the airlock is not an indicator of fermentation" and "always trust your hydrometer". These are two good pieces of advice for new brewers.
Please take a hydrometer reading of your wort. You can compare that with your original gravity reading taken prior to pitching the yeast in order to see if fermentation has in fact taken place.