12 399 rounded to the nearest 10 is 12 400 37 548 rounded to the nearest 1000 is 38 000
45.996 rounded to two decimal places is 45.00
39.9501 rounded to one decimal place is 39.9

3: 2

step-by-step explanation:

shorter piece is 2: 3, so just reverse it, and you get 3: 2

idc

step-by-step explanation:

idk

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'.