How much should it cost to replace the pipe that drains from the toilet?
False alarms can happen, but VERY seldom does that occur. I recall one such incident during my entire undergraduate college time. The problem is that a true fire can happen, and college students tend to consider those alarms to be false. Personally, I think you're worrying far too much about this issue!
Push ups work for your upper body and arms, For your triceps use a chair behind you to rest you palms, and slide. Do at least 30 reps (depending in ability). As you develop your muscles move to bicep curls and tricep pull downs