The People of California are collecting food cans, their goal is 2,000 cans, after 10 days they've got 800 cans, what is the percent of the cans they got.

40%

Step-by-step explanation:

What I did is 800/2,000 because since there goal is 2,000 and so far they have 800. I made a fraction because I wanted to know how much cans they need more witch is 1200 but I wanted to know the percentage they have so far before they meet there goal so I did 800/2,000 witch got me 40%

-6 is the correct option from the above given options

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.