Solve the multiplication first then the division and the subtract them to get something like this:
which simplifies to 29.7 (3 significant figure )
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
8x51. 8x50=? 8x5=40. 40 x 10 = 400 8x50=400. 8x1=8 400+8=408.
X would be less than 6 2/3.