Carla has three test scores of 85, 90, and 87. There is one more test during the semester. She wants to make an A in the class, which means she needs her average to be a 90. What grade does she need to make on the fourth test to make an A in the class?

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)