Simplify the expression.
4.6r + 2.8r

According to the data set, where should the upper quartile line of the box plot be placed?

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)

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)