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Alright, so for it to be centered, it needs to be x cm away from the left side and therefore x away from the right side (due to that if it's centered, it needs to be the same distance away from both), making the total width x+13.09+x=21.59=13.09+2x. Subtracting 13.09 from both sides, we get 8.5=2x and by dividing both sides by 2 we get x=3.25
Answer:
It will cost $190.75 to paint the whole fence.
Step-by-step explanation:
109 * 7 = 763 because Length x Width = Area
0.25 * 763 = 190.75
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As John Steele mentioned, the reason that we can’t ‘unfold’ the surface of a sphere (that is, as I take your meaning, place it onto a flat surface) has to do with the Gaussian curvature of the surface. Bending or even tearing the surface into pieces won’t change this curvature. The surface of a sphere and that of a flat surface have fundamentally different Gaussian curvatures which cause this to be impossible.
Consider extending some radius outwards from a point and drawing a circle at this radius. On a flat surface (ie euclidean) we measure this to be of length 2πr. On the surface of a sphere however we will always measure a smaller length than this. As an extreme example to illustrate this is true we can imagine starting at the north pole and having a radius that extends all the way down to the south pole - at this fixed radius the circle would have zero length - quite different than the same radius in euclidean space.
So if we want to press some section of a spherical surface onto a flat surface it becomes apparent that we will need to tear it at some point because we have a smaller circumference on our section than the flat surface has. What Gaussian curvature gets at however is that this phenomena exists in the space itself - down to an infinitesimal limit. We wouldn’t just have to tear our surface along one point to make it flatten - it ends up that every point in that space would have to be torn. I’m sure that you could imagine how this is problematic to our ideal ‘unfolding’ of the surface - its not much of a transformation if we need to tear it up into infinitesimal pieces.
https://www.quora.com/Why-cant-you-unfold-a-sphere-Isnt-the-surface-of-sphere-two-dimensional
