Please help HEYMLMUM

Find the values of y: 3y^3(y^2+ 2/3y)=0

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)

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?