Karla has 3 stocks in her portfolio. the value of her compu-whiz stock is $2,480.72. the new-enviro stock is worth $857.68, and her medi-search stock is valued at $4,375.80. the stocks take a downturn, and the portfolio loses $5,539.53. then, there is a gain of $567.92. what is the value of the portfolio after the gain?

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?