Can you help me answer my math classwork

If f(x)=2x+2and g(x)=x^3, what is (g•f)(2)

Which value is not a solution of 8x^3 – 1 = 0

Do more republicans (group a) than democrats (group b) favor a bill to make it easier for someone to own a firearm? two hundred republicans and two hundred democrats were asked if they favored a bill that made it easier for someone to own a firearm. how would we write the alternative hypothesis?