The area of a circle is approximately 3.14 time the radius squared. Which of the following expressions is a correct way to write this, if the radius is x?

A. (3.14x)^2

B. x(3.14)^2

C. 2(3.14)^x

D. 3.14x^2

ONLY the radius, x , should be squared....NOT the 3.14

3.14 x^2