Two trains leave the station at the same time, one heading east and the other west. the eastbound train travels at a rate of 65 miles per hour. the westbound train travels at a rate of 85 miles per hour. how long will it take for the two trains to be 210 miles apart?

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)