The area of a circle is approximately 3.14 times the radius squared. Which of the following expressions is a correct way to write this, if the radius is x?
A farmer has a rectangular field, which measures 100 feet for the length and w feet for the width. If the perimeter is the sum of all four sides of the field, what is an expression for the perimeter of the field? Simplify.
A. 2w + 200
C. 2w + 100 + 100
D. w + 100 + w + 100