A manufacturer produces a commodity where the length of the commodity has approximately normal distribution with a mean of 18.6 inches and standard deviation of 0.7 inches. If a sample of 45 items are chosen at random, what is the probability the sample's mean length is greater than 18.9 inches

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk

answer:

your answer is: c. 196 7/8 in^3.

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step-by-step explanation:

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