A particular brand of dishwasher soap is sold in three sizes: 30 oz, 40 oz, and 70 oz. Twenty percent of all purchasers select a 30-oz box, 50% select a 40-oz box, and the remaining 30% choose a 70-oz box. Let X1 and X2 denote the package sizes selected by two independently selected purchasers. a) Determine the sampling distribution of X. Calculate E(X). b) Determine the sampling distribution of the sample variance S2. Calculate E(S2).

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option

nada

step-by-step explanation:

cosine

step-by-step explanation:

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation: