An automatic machine in a manufacturing process is operating properly if the lengths of an important sub component are normally distributed with mean =117 cm and standard deviation =5.2 cm.

a. Find the probability that one selected sub component is longer than 120 cm.

b. Find the probability that if four subcomponents are randomly selected, their mean length exceeds 120 cm.

c. Find the probability that if four subcomponents are randomly selected, all four have lengths that exceed 120 cm.

no he doesnt because "-16' is negatiive

step-by-step explanation:

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb

5.762159

step-by-step explanation:

it would be 9 because when it is the nine is over five so that would mean it rounds up to 90 or 9