The experimental probability that Jonathan will win a game is 3/8 . If he plays the game 80 times, how many times can he expect to win?

Of four points are collinear, they are also coplanar

52 cm radius = diameter = area = circumference = circumfer

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?