You are having a conference call with mr. smith who is the owner of a paper company. you have interpreted the number of trees cut down versus profit as the following function. t(x) = −x4 + 3x3 + 21x2 − 43x − 60 for what numbers of cut trees will the company break even? show the work

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.

can you make your screen more see able?

then i might be able to .

the answer is b.

surface area: 169π

volume: 366π

i got it down.