The second and forth pic is the answers to the first and third pic.. second pic is the answers to first pic and the forth pic is the answer for the third pic..

Answer:pic # 1 answer is B. 81 x pi pic#3 answer is C. QCStep-by-step explanation:pic #1          the formula to find the area of a circle is pi x the radius to the second power they give you the diameter. (18)the radius is half of a diameter (d/2)so 18/3 = 99 to the second power (9 x 9) = 81so your answer is 81 x pipic#2         I don't much, but i do know they asking for the radius and since the radius is half the diameter of a circle then QC makes sense in my book.hope this is helpful.