Jessie wrote a computer program to create colored shapes. the shapes are either squares or circular and both are equally likely. the colors are either blue, red, or green, and each is equally likely.
what is the probability the computer program will create a green circle?
a)10%
b)16 2/3%
c)20%
d)33 1/3%

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?