Assume that the height of your cylinder is6inches.ConsiderAas a function ofr, so we can write that asA(r)=2r2+12r. What is the domain ofA(r)? In other words, for which values ofrisA(r)defined?

Continue to assume thatthe height of your cylinder is6inches. Write the radiusras a function ofA. This isthe inverse function toA(r), i.e to turnAas a function ofrinto.ras a function ofA.