The best thing to do is simply look at some of the coins in your pocket change, of course!
They don't. 50 is an integer, not a fraction.
There is actually no such thing as a 1973 'silver' penny. However, there are some Lincoln pennies from 1973-74 that have a shiny, silver-like look. These pennies are worth about $1.25.
The same as all the other pennies from 2000 to date just the year is different. Just like this one http://static.flickr.com/30/40192369_7f6c57b1ef_o.jpg
THEY AARE IN the hallway and look in some lockers upstairs near the libary
Oh, dude, 12 pounds of pennies would be like... around 2,400 pennies. I mean, if we're talking about U.S. pennies, because who knows what kind of pennies you might have laying around, right? So, yeah, about 2,400 pennies. But like, who's counting, right?