Can anyone help me with a problem for my physics lab? We are studying capacitance and I'm not even sure what this problem has to do with it. I think you're supposed to use a log or ln, but I never had calculus, so I don't think you're supposed to do it that way. Any help would be appreciated! The yearly growth rate of the US is 1 percent. Assuming this growth rate to be constant, in how many years will the population double?