1. The problem statement, all variables and given/known data Pluto is 40 times further from the Sun than we are. How long is a year on Pluto? (Use Kepler's third law.) 2. Relevant equations 4∏^2/Gm=T^2/r^3 3. The attempt at a solution Te^2(Earth period)=x*r^3 Tp^2(Pluto period)=x*(40r)^3 I don't know what to do exactly from here. I'm not even entirely sure that I'm going about this the right way. Any help would be appreciated.