A seafood restaurant claims an increase of $1,050 over its average profit during a week where it introduced a special of baked clams. if this is true, how much extra profit did it receive per day?

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?