28. Use the Distributive Property to simplify x(4x^2 + x + 4)

Is it 4x^3 + x^2 + 4x?

Thanks
-MC

Also:

42. To which set of numbers does 0 not belong?

46. Pi belongs to which group of real numbers?
a. Odd numbers
b. rational numbers
c. irrational numbers
C?

48. Can a number be both irrational and an integer?
a. yes
b. no
c. sometimes

Help! Thanks
-MC