In August,American Secretary of State Hillary Clinton promised more than seventeen million dollars to fight sexual violence in the D.R.C.
VOA : special.2009.10.24
2
Generally, if it pays c dollars for every period, the present value is c/r.
推广开来,如果在每段时期内支付c美元,那么它的现值就是c/r
金融市场课程节选 : 耶鲁公开课
3
If you had a perpetuity, which paid C/2 forever, you already know from the perpetuity formula that the value of that would be C/2 divided by r/2 if r/2 is the discount rate.