Ahotel has 18 floors. the hotel owner believes the number 13 is unlucky. the first 12 floors are numbered from 1 to 12. floor 13 is numbered 14, and the remaining floors are numbered from 15 to 19. the hotel manager starts on the top floor of the apartment building. he rides the elevator two floors down. the doors open and a hotel guest gets in. they ride the elevator three floors down. the hotel guest gets off the elevator. the hotel manager rides the elevator the emaining floors down to the first floor

46.2+112.3

step-by-step explanation:

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.

pla·gia·rism

/ˈplājəˌrizəm/

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noun

the practice of taking someone else's work or ideas and passing them off as one's own.

step-by-step explanation: