Which set of coefficients of the terms in the expansion of the binomial (x + y)3 is correct?

1, 3, 3, 1

1, 4, 4, 1

1, 2, 2, 1
d. 1, 5, 5, 1

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)