A certain Geiger counter is known to respond to only 1 of every 1000 radiation events from a sample. Calculate the activity of each radioactive source in curies, given the following data.

My text barely attempts to explain how to do this problem, and there is no example. I am guessing the equation i need to use is Activity = k*N

I tried using k= 580/104 and N= (1/1000) and multiplying those values, but it's incorrect. I am not sure what to use for N....and can't find an example...

You didn't give any data.