Consider a demand or load versus capacity or strength relation, z = r - s, where r denotes the capacity and s the demand. assume that capacity is described by a normal distribution with r  = 200, r = 40, and the demand is also described by a normal distribution with s = 100, s  = 30. a) what is the distribution of z? b) estimate the mean and standard deviation of z; c) calculate the reliability index  and probability of failure pf.

square root of 36/6 = 2.449489743

square root of 16/6 = 1.632993162

square root of 6 = 2.449489743

the answer is square root of 16/6 because the square root of 36/6 is the same answer as square root of 6 = 2.449489743

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

answer: what are the following choices