Plz help!

Write an expression that contains at least two terms and is in simplest form.

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 image (a’ b’ c’ d’) of abcd cannot he produced using only reflections ?

Im so bad at fractions they are not my best math thing to work on