Pls help with my geometry it’s due tomorrow

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)

An octagonal prism has jow many lateral faces?

Isaac wants the equation below to have no solution when the missing number is placed in the box. which number should he place in the box?