Please help me with this question, I don't know how to solve it

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)

Which number line correctly shows 0.8 + 0.3?

Find the distance between the pair of points a(-1,8) and b(-8,4)