A solid sphere of radius r carries a nonuniform volume charge density given by rho(r)=rho0(r/r)n, where rho0 is a constant and n is an integer greater than -3.

Randy and trey take turns cleaning offices on the weekends. it takes randy at most 4 hours to clean the offices. it takes trey at most 6 hours to clean the offices. what is the greatest amount of time it would take them to clean the offices together? 2.4 hours 2.5 hours