Write a Polynomial for the Width of the Rectangle $4 + 3 x ^ { 4 }$

Multiple Choice

Write a polynomial for the width of the rectangle.
-Write a polynomial for the width of the rectangle.

A) $4 + 3 x ^ { 4 }$
B) $4 x + 3 x ^ { 4 }$
C) $x + 3 x ^ { 4 }$
D) $18 x + 18 x ^ { 5 }$