Polygon ABCD is reflected and dilated to give polygon PORS. The coordinates of the prelmage are (2, 2), (6,8). (12,8), and (16, 2). The coordinates of the image are (11, 15), (9, 12), (6, 12), and (4.15). What is the scale factor of the dilation?
OA 0.25
OB. 0.33
OC. 0.5
OD. 0.75

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?