Change the percent to a decimal. 370% = 0.37 37.0 0.037 3.7 67% = 6.7 0.67 670 0.067 0.43 = 4.3% 43% 0.43% 0.043% 1.3 = 1.3% 13% 0.13% 130% 0.4% = 0.004 0.4 4.0 0.04

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.