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vivado [14]
3 years ago
11

Subtract 273-188 she began by finding 2-1 what did Edie do wrong

Mathematics
2 answers:
Viktor [21]3 years ago
3 0
Assuming she set up the problem vertically, she began subtracting from the left, instead if the right.
Solnce55 [7]3 years ago
3 0
She started by subtracting to the left but she was supposed to start from the right to get reasonable answer


Hope this helps
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9514 1404 393

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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It is this equation that must be solved iteratively. We find the solution to be ...

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<em>Additional comments</em>

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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We used Newton's method iteration to refine the estimate of the angle from that shown on the graph. The iterator used is x' = x -f(x)/f'(x), where x' is the next guess based on the previous guess of x. Only a few iterations are required obtain an angle value to full calculator precision.

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