A pencil company has four extruders for making pencil lead. The probability of each machine breaking down on a single day is 0.3, and each breakdown is independent. (a) (2 points) What is the probability that all 4 extruders go down on one day? (b) (2 points) What is the probability that 2 or more extruders are down? (c) (3 points) What is the mean number out of operation? (d) (3 points) What is standard deviation of the number out of operation? (e) (2 points) Assuming an average cost of $500 to repair a machine then what is the expected daily cost of maintenance?

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

answer: the distance

step-by-step explanation:

to calculate the distance d of a line segment with endpoints (x1, y1) and (x2, y2) use the formula d (x2 x1)2 (y2 y1)2. to calculate the midpoint of a line segment with endpoints (x1, y1) and (x2, y2) use the formula

8

step-by-step explanation:

sorry i really don't know what tiles and steps you are referring to

step-by-step explanation: