Which graph shows rotational symmetry?

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

5. which description does not guarantee that a quadrilateral is a squar ajo is a parallelogram with perpendicular diagonals 0% has all sides congruent and all angles congruent o has all right angles and has all sides congruent 10% is both a rectangle and a rhombus 30%

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?