7.Russel has a house worth $200,000 but he still owes $195,000. She has a car that is worth $50,000 but he still owes $45,000. He has a credit card bill with a balance of $1,500 and a card collection worth $500. What is his total value of assets?

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?