The formula for the area of a circle is

We know the diameter, and the radius is half of the diameter. So the radius is 9. Now we plug that into the formula.

So the answer is B, 81 pi square feet
Answer:
336
Step-by-step explanation:
Answer:
(e^3 / e^2n)
Step-by-step explanation:
isn't this the same question
For number 2 it's would be 12.8
Sorry I don't have time for number 3