Ineed with ! time is running ! will mark ! take a look at photo, to answer the !

f(x) is the same as y.

Inversely means: y*x = k

Step 1: Solve for k when y = 2 and x = 16

   2 * 16 = k

⇒32 = k

Step 2: Input k and the given value (x = 4) to solve for the remaining variable (y)

y * x = k

y * 4 = 32

     y = 8

D) 8

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.