Question 1 of 10 The average heights of four samples taken from a population of students are
shown in the table. Which of these is most likely closest to the average height
of the population?
Sample size
Average height
(inches)
10
61
20
52
30
55
40
57
A. 52
R61

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.

answer: 12,000

step-by-step explanation: first you ar e supposed to add. then multiply then subtract