What is 745826 rounded to the nearest ten thousand

How do i do this? i don’t understand

Write a similarity statement for the similar triangles. afgh ~ a

Pentagon abcde is dilated according to the rule do,3(x,y) to create the image pentagon a'b'c'd'e', which is shown on the graph. what are the coordinates of point a of the pre-image? a) (-1, 1)b) (-1, 2)c) (-9, 6)d) (-9, 18)