A law firm pays a third$-$party to pick up confidential documents and deliver them to a shredding service. This cost, C$,$ in dollars, is a function of the weight of paper, w$,$ in pounds, that is shredded for each client's case, such that C$=$f$($w$).$ Describe the meaning of each quantity. A$.$ f$(65)=45$ B$.$ f$\text{'}(80)=1\mathrm{.}25$ C$.[$f$^-1(200)]\text{'}=2\mathrm{.}5$