PLEASE HELP WITH GEOMETRY

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)

The owner of the plant nursery where you were tells you to fill 350 ml bottles from a 30 l from a fertilizer

10x − 5y + 14 = 0 whats the answer pls