Jessica wants to buy a purse that costs $25.00. She has already saved $19.00. Which inequality represents the least amount of money Jessica
must save to have enough money to buy the purse?

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?