A mass production line manufactures products of which 10% are faulty. A quality assurance (QA) expert samples products from the production line until he finds a defective product. a. What is the variable under study? (1.5) b. What is the probability that the QA expert sampled at least two products until he got the first defective product? (3) c. Find out the average number of sampled products to get the first defective product. (1.5) d. Also find out the standard deviation of the sampled products to get the first defective product. (1.5)

answer:  

123455421

step-by-step explanation: easy

answer: b. f(x) = (x + 2)^3 (x^2 - 7x + 3)^4

step-by-step explanation:

polynomials always have as many roots as their order. this is a 4th order polynomial- hence 4 roots!

complex roots of polynomials always come in pairs. the quadratic equation has the "+/-" in that will alwaysgenerate m+ni amd m-ni, so 7-2i must be a root of this polynomial equation.

the order of the numerator and denominator are both 2. so the horizontal asymptote is y=a2/b2 =7

verticle asymptotes are the forbidden x-values. f(x) becomes undefined at x=-3 because this value will cause a zero denominator.

a graph of r(x) will have vertical asymptotes at ±1 because these values will make the denominator zero. so the domain of the function cannot include ±1.

you 're wlecome! : )

cretdit to source

none of the above chief keef