Try this with your company uses the equation V equals 24,000-3000 X to estimate the depreciated value of the computer in dollars after X number of years

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?