Use the following scenario and data for questions 34 to 40: The number of customers arriving at an ATM machine follows a Poisson distribution with a mean of equation per time unit. A time unit has 5 minutes. Use equation to denote the time between two customer arrivals. The mean (or expected value) of equation in minutes is closest to

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: the answer is b. i think hope i got it correct

step-by-step explanation: