What is the current value of a future sum of money called? current value present value future value

The current value of a future sum of money is called :

                Present value.

Present value--

In economics and finance the present value gives us the information of how much the future sum of money is worth today.

The future cash flow is discounted at some rate.

If the discount rate is higher the present value of the future money is low.

Present value is also known as  present discounted value.

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.