2. The four sides of a picture frame consist of two pieces selected from a population whose mean length is 30 cm with standard deviation 0.1 cm, and two pieces selected from a population whose mean length is 45 cm with standard deviation 0.3 cm. a. Find the mean perimeter. b. Assuming the four pieces are chosen independently, find the standard deviation of the perimeter.

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Q: help

A: Please refer to the image below

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A: This question can be solved using formula for reducing powers cos A2=1+cos(2A)2

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A: COst function C(x) = 0.001x3+0.2x2+38x+250where x = no. of items producedNow, if x = 30 then C(x) =…

Q: please check my work for this problem. thank you.

A: Yes your work is correct. Well done.

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A: *used power rule

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A: We’ll answer the first question (#4) since the exact one wasn’t specified. Please submit a new…

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A: By using a scalar projection to find the shortest distance from the point 1,-2, 5to the plane given…

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A: Solution : The given equation is    x=√x + 6

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A: