Find the circumference of a circle with radius of 18 in. leave your answer in terms of π

Twelve less than a number is at most 20

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)

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer