The sides of a square are 5 2/5 inches long. what is the area of the square? a) 5 4/5 b) 5 4/25 c) 25 4/5 d is incorrect so i won’t state what it is.

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?