As we saw in the module on radioactivity, if you held a Geiger Mueller counter out in front of you, it would click about 15 times per minute (this is the background radiation). Suppose you have 1 kg of radon gas (Rn-222, half-life is about 4 days) in a sealed box. How long do you need to wait until the radioactivity of the radon gas is the same as the background radiation? Substantial partial credit is given here. Be sure to show your work