1. The problem statement, all variables and given/known data An obect whose mass is distributed according to function m(r)=m0e-r, for r ranging from 0 to ∞. Calculate total mass of the object. Write down and evaluate appropriate integral. 2. The attempt at a solution well, I wasnt sure really how to start but thought it may be m(0) + m(∞) where m(0) would become just m0 leaving m0+ m∞e-∞. Although i really have no idea. This is part of a really strange module at my uni where there are no lectures and just a worksheet given out every other week with no guidance. :/ Thanks for any help!