What is equivalent to the expression 2/5 divided by 4

1foot = 12 inches; 1 yard = 3 feet

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)

Simplify the expression below -3(10x+4y)+6(6x-2y)