Select the correct answer from each drop-down menu.
Ronald is buying a rectangular chest to store his carpentry tools. The height of the chest, in feet, is represented by the function [tex]$H(x) = x + 6$[/tex]. The area of the base of the chest, in square feet, is represented by the function [tex]$A(x) = \frac{20 \sqrt{3}}{3}$[/tex]. In both functions, [tex][tex]$x$[/tex][/tex] represents the width of the chest in feet.
To find a function that represents the volume of the chest, Ronald should \_\_\_\_\_ functions [tex]$H(x)$[/tex] and [tex]$A(x)$[/tex].
The function that represents the volume of the chest is [tex][tex]$V(x) = \frac{20 x \sqrt{3}}{3} + \_\_\_\_\_$[/tex][\tex]