There are 600 pipes in stock at Patty's hardware store .She randomly selects 40 pipes to measure. In that sample,8 pipes are 30 inches long. How many pipes in stock at her store can Patty predict are 30 inches long?

idk man good luck man

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.

according to egenuity the answer is

step-by-step explanation:

d. 344.22