Five of Lucy's friends decided to split the cost of a $130 birthday gift. Then a sixth and seventh friend decided they also want to help purchase the gift. About how much less will each of the first five friends have to spend now that two more friends are contributing to the cost of the gift?

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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)