Which expression  best  estimates  ?





With alll of except for the 2 that i did already

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?

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?