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ANEK [815]
3 years ago
12

You bought 8 dvds for $22 each and 4 dvds for $13 each.

Mathematics
1 answer:
Lorico [155]3 years ago
4 0

Answer:

the average is

add 22 8 times and add 13 4 times

8×22=176

4×13=52

52+176=228

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Answer:

  about 44.5 feet

Step-by-step explanation:

We can write relations for the height of the rail as a function of initial length and expanded length, but the solution cannot be found algebraically. A graphical solution or iterative solution is possible.

Referring to the figure in the second attachment, we can write a relation between the angle value α and the height of the circular arc as ...

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Then the length of the expanded rail is ...

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So, the height of the circular arc is ...

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The rail will bow upward by about 44.5 feet.

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Note that s and c in the diagram are half the lengths of the arc and the chord, respectively. The ratio of half-lengths is the same as the ratio of full lengths: c/s = 2640/2640.5 = 5280/5281.

We don't know the precise shape the arc will take, but we suspect is is not a circular arc. It seems likely to be a catenary, or something similar.

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