The exchange rate for Japanese yen, y, is directly proportional to US dollars, x dollars. On a certain day, Ms. Lee buys US$12 for 1,338 Uapanese yen). How much Japanese yen can she buy for US$50
on the same day?

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)