3 Write an equation and solve The booster club of a basketball team bought
pizzas to sell at a concession stand. The
school donated three pies to the sale. Each
pie was then cut into eight pieces and sold.
There were a total of 64 pieces to sell. How
many pies did the booster club purchase?

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?