IF YOU COULD HELP OUT THAT WOULD BE GREAT :)

What is the logarithmic function modeled by the following table? x f(x) 9 2 27 3 81 4

Ten times the square of a non-zero number is eqaul to ninety times the number

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)