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Scientific Notation - Tutorial - Part 2 - Level H
The width of our local galactic group, which includes our very own
Milky Way galaxy and the other 52 galaxies “nearby,” is 4 * 1022
meters. The estimated width of the universe is roughly 9% 1026 meters.
About how much wider is the universe than our local galactic group?
(4 x 1022 m) * (? x 10°) = (9 * 1028 m)
Local Galactic Group
Universe
less than 2,000 times wider
more than 20,000 times wider
less than 20,000 times wider
more than 50,000 times wider
No

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)