30 points if awnsered use (9,6) as the center of dilation and complete the following statements

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

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)

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).