It takes elsa 10 minutes to mix up a batch of muffins the muffins bake for 20 minutes and then cool for one hour then elsa spend 15 minutes packaging and labeling the muffins how much time in all does elsa spend making a batch of muffins ready to sell

answer: 10 meter

step-by-step explanation:

need details

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.