How old do citizens have to be to vote for President? a 16 and older b 21 and older c 25 and older d 18 and older

Why is the supremacy clause considered to be the root of federalism?

Which of the follow statements about drinking alcohol and driving is true

Which of the following is a polynomial with roots 3,5i, and -5if(x)=x^3-3x^2+25x-75f(x)=x^3-3x^2+15x-25f(x)=x^3-15x^2+25x-75f(x)=x^3-3x^2+15x-75