How many centimeters are there in 1 yard if there are 2.54 centimeters per inch?

If the discriminant if a quadratic equation is 4 which statement describes the roots?

Aye asap pls ! markin da brainiest too ! btw da step choices are all add, distribute, divide, n subtract

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?