We are 95% confident that the interval from $113.05 to $136.95 captures u = the true mean purchase total for all customers.
Is it plausible that the true mean purchase total for all customers may be $140?
Yes, this is a plausible value for the population mean because $140 is within the 95% confidence interval.
O No, this is not a plausible value for the population mean because $140 is within the 95% confidence interval.
O Yes, this is a plausible value for the population mean because $140 is only a little bit above the upper boundary of
the 95% confidence interval.
No, this is not a plausible value for the population mean because $140 is not within the 95% confidence interval.

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.

thats not a system of equations, that is a solution

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step-by-step explanation: