4. A Ferris wheel is moving around in a circle in a counterclockwise direction. It has a radius of 50 feet and it takes 24 seconds to go around the circle once. Its lowest point is 5 feet off the ground. A passenger is at the "3 - o'clock” position when t = 0. Write an equation that represents the height of the chair in terms of time.

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)