CNNBC recently reported that the mean annual cost of auto insurance is 1003 dollars. Assume the standard deviation is 282 dollars, and the cost is normally distributed. You take a simple random
sample of 38 auto insurance policies. Round your answers to 4 decimal places.
a. What is the distribution of X? X-N( 1003 282 OOM
b. What is the distribution of X? X-NC 1003 45.746)
c. What is the probability that one randomly selected auto insurance is more than $959?
d. a simple random sample of 38 auto insurance policies, find the probability that the average
cost is more than $959.

the y will be in still but your answer will be y x 3

step-by-step explanation:

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step-by-step explanation:

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

step-by-step explanation: