Aspecific type of concrete has a normally distributed compressive strength with a mean of 1 psi and standard deviation of 1500 psi. the concrete is used to cast ten beams. the minimum compressive strength expected of each beam is 8750 psi. • determine the probability that two of the ten cylinders will fail the minimum compressive strength requirement? • determine the probability that atleast three cylinders will fail the minimum compressive strength requirement?

the answer is 175.4379

step-by-step explanation:

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.

a

step-by-step explanation:

answer: your answer is c

step-by-step explanation: