Sarah is selling bracelets and earrings to make money for summer vacation. The bracelets cost 2 Pesos each while the earrings cost 3 Pesos. She needs to make at least 500 Pesos. How many bracelets can Sarah sell?

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?