Near the end of a star's life , star will eject gas, forming a plane tary nebula . The Ring Nebula is an example of a planetary nebula The volume V (in cubic kilometers ) of this nebula can be modeled by V = (9.01 * 10 ^ - 6) * t ^ 1 is the age (in years ) of the nebula . Write the inverse model that gives the age of the nebula as a function of its volume . Then , determine the approximate age of the Ring Nebula given that its volume is about 1.5x 10 cubic kilometers