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Suppose the radius of a circle is 16. what issuppose the radius of a circle is 16. what is its circumference its circumference

You have 138.72 in your saving account u take out 45.23 and 18.00 you deposit 75.85 into your account

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?