Answer:
12.57
Step-by-step explanation:
The formula to find the area of a circle is A=πr^2. Radius is half the diameter, so the radius is 2. 2 squared is 4. Now the equation is A=4π. π, (pi,) should be used as 3.14 in this equation since your answer has to be a decimal. 3.14 multiplied by 4 = 12.57.
