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lilavasa [31]
3 years ago
8

Estimate by rounding to the nearest hundred 657 - 125.

Mathematics
1 answer:
DIA [1.3K]3 years ago
6 0

Answer:

700-100=600

Step-by-step explanation:

600

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A rectangular solid with a square base has a volume of 2,744 cubic inches. (Let w represent the length of the sides of the squar
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Answer:

For minimum surface area, the base length and height are equal in length and <u>equal to 14 inches.</u>

Step-by-step explanation:

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Height of solid = 'h'

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Surface\ area=2w^2+4\times\frac{2744w}{w^2}\\\\Surface\ area=2(w^2+\frac{5488}{w})

Now, for minimum surface area, the derivative of surface area with respect to length 'w' must be 0.

Differentiating both sides with respect to 'w' and equating it to 0, we get:

\frac{dS}{dw}=0\\\\\frac{d}{dw}[2(w^2+\frac{5488}{w})]=0\\\\2w-\frac{5488}{w^2}=0\\\\2w=\frac{5488}{w^2}\\\\w^3=\frac{5488}{2}\\\\w=\sqrt[3]{2744}= 14\ in

Therefore, the base length is 14 inches.

Now, from equation (1), the height is given as:

h=\frac{2744}{w^2}\\\\h=\frac{2744}{14^2}=14\ in

Therefore, for minimum surface area, the base length and height are equal in length and equal to 14 inches.

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