Four times the difference of a number

Each equation given below describes a parabola. which statement best compares their graphs? x = 2y^2 x = 8y^2

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)-144x+360 what am i doing wrong?

What is the volume of a cone with a height of 6 cm in the radius of 2 cm