service time for a customer coming through a checkout counter in a retail store is a random variable with the mean of minutes and standard deviation of minutes. suppose that the distribution of service time is fairly close to a normal distribution. suppose there are two counters in a store, customers in the first line and customers in the second line. find the probability that the difference between the mean service time for the shorter line and the mean service time for the longer one is more than minutes. assume that the service times for each customer can be regarded as independent random variables.

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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! : )

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answer: 10 turtles

step-by-step explanation: as turtles have four legs so 4.10=40 therefore birds are 4 which sue counted

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step-by-step explanation:

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