4. Paula Demaline is looking at a new sedan that has a base price of $ 37,580, options totaling 82,365, and a destination charge of $ 680. The dealer's cost is 9LSN of the base price and 80. of the options price. to. What is the sticker price of the vehicle? b. What is the estimated dealer's cost? and. What will she pay if she can buy the vehicle for $ 25 less than the dealer's cost?

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.