5/6=7n+9/9 how do i do this

Which of the following is the true for f(x) = 5cos

Which type of graph would allow us to compare the median number of teeth for mammals and reptiles easily

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)