Which is equivalent to (4xy – 32), and what type of special product is it?
16x? y? +922, the difference of squares
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16x? y? +9z? , a perfect square trinomial
16x? y2-24 xyz +9z? , the difference of squares
16x+y2-24 xyz +92, a perfect square trinomial

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)