If I know the area of a square, how do I find the side length? do take the square root of the area ?

Sara bought a pair of pants that were on sale for 30 percent off of the original price. if the original price of the pants was $29, what was the sales price of the pants?

The base of a triangle is 8 1 3 meters and the height of the triangle is the fourth root of 16 meters meters. what is the area of the triangle?

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi